calculate the pH of 10 g dm-3 HCL​

pH before addition of any KOH = 4.10

pH after addition of any KOH = 7.40

The quantitative measure of the acidity or basicity of aqueous or other liquid solutions is known as pH. In pure neutral (neither acidic nor alkaline) water, the concentration of hydrogen ions is 10⁻⁷ gram-equivalents per liter, which means a pH of 7. Solutions below pH 7 are acidic. Solutions of pH greater than 7 are basic or alkaline.

For the given question:

HClO ⇄ H⁺ + ClO⁻

Kₐ = 4 × 10⁻⁸

Kₐ = [H⁺ ][ClO⁻]/[HClO]

Let, [H⁺ ] = [ClO⁻] = x

Since [HClO] = 0.160 M

Then,

4 × 10⁻⁸ = x²/0.160

x = 8.0 × 10⁻⁵ M which is [H⁺ ]

pH = -log[H⁺ ]

pH = 4.10

Now initial moles of HClO = 0.05L × 0.160 mol/L

= 8 × 10⁻³ mol

Addition of 25.0 ml KOH adds 4 × 10⁻³ mol of KOH which reacts with HCl forming 4 × 10⁻³ mol ClO⁻ leaving 4 × 10⁻³ mol of HClO

Concentration [ClO⁻] =  4 × 10⁻³ mol / 0.0750L

= 0.0533M

Now,

Kₓ = 4 × 10⁻⁸

= [H⁺ ](0.0533)/(0.0533)

[H⁺ ] = 4 × 10⁻⁸

pH = 7.40

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The number of dots in the Bohr Rutherford Diagram for sulphur-32 is equal to 16 as the dots represent the number of electrons and the sulfur atoms have 16 in its atom. Bohr Rutherford's Diagram of sulphur-32 is shown below.

Bohr's model described the atomic structure by explaining the electrons move in definite and fixed orbitals or electron shells.  Boh's model proposed that atoms contain a nucleus and the electrons surround this atomic nucleus.

Each orbit has fixed energy and the energy levels are represented with integer 1, 2, 3,.... and sometimes also represented as K, L, M, N...... shells.

When the electron moves from a lower energy level to a higher energy level then it absorbs energy and when the electron falls from a higher energy level to a lower energy level then it emits energy.

The atomic number of the sulfur atom is 16 so it has 16 electrons. Therefore, we can show 16 dots surrounding the nucleus in the Bohr-Rutherford Diagram.

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Answer:

50.8g of iodine is produced.

Explanation:

You have to do stoichiometry. To get grams of iodine produced.

(Remember to multiply across the top and divide by the bottom)

[tex]\frac{14.2g Cl2}{1} * \frac{1 mol Cl2}{70.9g} * \frac{1 mol I2}{1mol I2} * \frac{253.8g}{1 mol I2}[/tex]

Since 2 2.60 PPM singlet was seen for the /C-CH, Proton, and IHNMR data clearly showed the presence of acetophenone. IHNMR chemical with a multiplicity of 2.60 PPM is singlet, and there are 3 photons in total.

IHNMR chemical with a multiplicity of multiple number of photons of 7.49 to 7.45 PPM and a Proton number of 1. acetophenone number of photons in an IHNMR chemical with a multiplicity of 7.60 - 7.55PPM is multilaterally 2. IHNMR Chemical of multiplicity 7:98 - 7.94 PPM is multiplet no. of Proton is 2. So, Acetophenone chemical will be administered. Only one at proton comparatively shielded opposition and miter will give multiple in the benzene ring according to the IHNMR value of one singlet observed at 2–6 1 PPM. OxfordCryosystems.

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Answer:Anaxonic Neurons

Explanation:

The following molecules has an atom with an incomplete octet is BF₃.

the following molecules given as follows :

a) NF₃ - it follow the octet rule. all the atom present have there octet complete. the molecule is stable;

b) H2O - all the have complete octet.

c) AsCl₃ - all the atoms have 8 electron in valence shell and follow octet rule.

d) GeH₄ - thos molecule also follow the octet rule

e) BF₃ - not follow the octet and have incomplete octet. Boron atom have in complete octet.

thus, The following molecules has an atom with an incomplete octet is BF₃.

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The correct sequence of ideas that led to the current model of the atom is as follows:

1. Dalton developed the theory that all matter is made of atoms.  

2. Thomson discovered that atoms contain electrons.

3. Rutherford discovered that atoms have a nucleus.

4. Bohr developed the model in which electrons orbit the nucleus.

5. Schrödinger developed the electron cloud model of the atom.

An atom is the smallest unit of a chemical element that can take part in a chemical reaction.

The atomic theory of matter is the theory that all matter is composed of atoms.

Atoms are composed of electrons, protons, and neutrons.

Several scientists contributed ideas that led to the current model of the atom. These scientists include:

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Complete question:

Order the sequence of ideas that led to the current model of the atom. Place a number in front of each event to show the correct order.

Rutherford discovered that atoms have a nucleus.

Dalton developed the theory that all matter is made of atoms.

Schrödinger developed the electron cloud model of the atom.

Bohr developed the model in which electrons orbit the nucleus.

Thomson discovered that atoms contain electrons.

The molarity of a resulting solution is 0.707 mol/L

The molarity of a solution is defined by the amount of solute in moles divided by the volumes of solution in litres.

1 grams of ammonia is equals to 0.05872 mol

100 grams  of ammonia is equals to 5.872 mol

Molarity of a resulting solution would be = 100 gm of NH3 / 8.3 L of a solution.

That is 5.872 moles of NH3 / 8.3 of a solution.

Molarity of a resulting solution would be 0.707 mol/L of a solution.

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The volume of 0.250 m sulfuric acid necessary to react completely with 74.3 g sodium hydroxide is 3.7 L.

The chemical reaction of sulfuric acid and sodium hydroxide is given as below:

H2SO4 + 2NaOH ------- Na2SO4 + 2H2O

From above, we noticed that, one mole of sulfuric acid react with two moles of sulfuric acid.

Therefore, firstly we convert grams of sulfuric acid into moles.

As we know that, molar mass of sodium hydroxide is 40 g.

It is defined as the given mass to the molar mass of substance.

Mathematically,

Moles = Given mass / molar mass

Given mass of sulfuric acid = 74.3 g

By substituting all the values, we get

Moles = 74.3 / 40

= 1.85 mol

So, 1/2 moles of sulfuric acid one moles of sodium hydroxide.

Or, 1.85 moles of sodium hydroxide react with 1/2 × (1.85) moles of sulfuric acid.

1.85 moles of sodium hydroxide react with 0.925 moles of sulfuric acid.

Now,

Concentration of sulfuric acid = 0.250 M

Moles of sulfuric acid = 0.925 mol

C = m/ V

V = m/ C

= 0.925/ 0.250 = 3.7 L

Thus, we concluded that the volume of 0.250 m sulfuric acid necessary to react completely with 74.3 g sodium hydroxide is 3.7 L.

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It  is true about free radicals. a. they are unstable and highly reactive molecules.

Hydrogen peroxide and hydroxyl ions are two examples of oxygen-containing molecules with an unbalanced number of electrons. The unequal distribution of electrons makes it simple for them to interact with other molecules. To combat free radicals, use antioxidants. Heart disease and cancer are caused by free radicals. an unstable molecule type produced by typical cell metabolism The physiological metabolism produces some of these reactive molecule species (RMS), also known as "Hydrogen peroxide and hydroxyl ions are two examples of oxygen-containing molecules with an unbalanced number of electrons. The unequal distribution of electrons makes it simple for them to interact with other molecules. To combat free radicals, use antioxidants. Heart disease and cancer are caused by free radicals. an unstable molecule type produced by typical cell metabolism The physiological metabolism produces some of these reactive molecules species (RMS), also known as "free radicals" or "oxidants." Cell compartments and cells are hurt or destroyed when RMS concentrations go above a certain free radicals" or "oxidants." Cell compartments and cells are hurt or destroyed when RMS concentrations go above a certain point. These reactive molecules species (RMS), also known as "free radicals" or "oxidants," are a by-product of some physiological processes.

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The hydronium-ion concentration of the solution containing 0.0085 M Ba(OH)₂ is 0.017M and the hydroxide-ion concentration of the solution containing 0.0085 M Ba(OH)₂ is 5.88 × 10⁻¹³ M.

Given,

Ba(OH)₂ = 5.88 × 10⁻¹³ M

Dissociation of Ba(OH)₂ is given as :

Ba(OH)₂ → Ba²⁺ + OH⁻

Balanced equation:

Ba(OH)₂ → Ba²⁺ + 2OH⁻

As 1 mole of barium hydroxide produces 2 moles of hydroxide ions, so the concentration of hydroxide ion is,

[OH⁻] = 2 × [Ba(OH)₂]

[OH⁻] = 2 × 0.0085 M

[OH⁻] = 0.017 M

The concentration of hydronium ion is as follows:

[H₃O⁺] = Kw / [OH⁻]

∴ Kw = 1.0 × 10⁻¹⁴

[H₃O⁺] = 1.0 × 10⁻¹⁴ / 0.017

⇒ [H₃O⁺] = 5.88 × 10 ⁻¹³

Hence, the hydronium-ion and the hydroxide-ion concentration of the solution containing 0.0085 M Ba(OH)₂ at 25°C are 5.88 × 10 ⁻¹³ and 0.017 M respectively.

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When a sealed balloon containing Helium is squashed so its volume decreases, and no helium enters or leaves the balloon the density of the Helium in the balloon increases.

Note that the expression or equation for density is:

Density = Mass/ Volume

But we know that the mass of the Helium Atom is Constant.

Lets assume that is is 1,

Hence,

Density = 1/V

Hence, if V reduces, D increases creating an inverse relationship.

Note that the term density refers to how much space an item or substance occupies (its volume) in proportion to the amount of matter in that thing or substance (its mass). Density may also be defined as the quantity of mass per unit of volume.

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60 ml of a 14.0 M NH₃ stock solution are needed to prepare 200 mL of a 4.20 M dilute NH₃ solution.

Using the formula given below ,

M₁ x V₁ = M₂ x V₂

M₁ = concentration of stock solution

V₁ = volume of stock solution (to be found out)

M₂ = concentration of diluted solution

V₂ = volume of diluted solution;

V₁ = (M₂ x V₂) / M₁

= (4.2 x 200) / 14

= 60ml

Hence , 60 ml of a 14.0 Mole NH₃ stock solution are needed to prepare 200 mL of a 4.20 M dilute NH₃ solution.

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Answer:

digestive system

.

Explanation:

Helium(He) will have the highest electrical conductivity.

Magnesium (Mg) is a metal, so it is electrically conductive in nature, though not as much as hydrogen and helium.

Above certain temperatures, hydrogen(H) is also electrically conductive.

Helium(He) The ease with which an electric charge or heat can pass through a material is measured as conductivity. A conductor is a material that resists the flow of an electric current or thermal energy very little. Metals are generally good conductors of electricity.

Because chlorine(Cl) is a nonmetal, it has the lowest electrical conductivity.

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In the polysaccharide amylose,a large number of monosaccharides are linked together through alpha 1-4 glycosidic linkages.

Alpha 1-4 linkage is a stored form of sugar in plant. In this carbon atom 1 and 4 of the the two monomers forms a glycosidic bond. Polysaccharides are long chain forms of monosaccharides linked together by glycosidic bonds.A glycosidic bond is a covalent bond that joins a carbohydrate molecule to another group.this bond gives glycogen that is suitable for energy storage.

Amylose is plant starch made from monosaccharide connected through alpha 1-4 linkages.monosaccharides are the simplest form of sugar.from monosaccharides, all carbohydrates are built.

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A shorter, easier way to show chemical reactions, using symbols instead of words, is called a Chemical equation.

All the elements in chemistry have specific name and properties. Along with this, they all have a particular sign like Na for sodium, Ar for Argon and K for potassium.

Rather than writing the full name in words of the elements, we write only the symbols of the element along with the products and the reactants separated by using a arrow pointing towards products side.

For example,

Chemical reaction: Sodium hydroxide reacts with Hydrogen chloride to form Sodium chloride and water.

Chemical equation: NaOH + HCl → NaCl + H₂O.

So, as we can see from the example, the chemical equation is much more easier to understands and shorter.

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14:1 (delta 11) denotes the presence of a single double bond at carbon 11, starting at the carboxyl terminus, in the fatty acid.

How is omega-3 created?

The chloroplasts of plants, including grass, leaves, green algae, and other plants, produce omega-3s. Fish, animals, and humans are unable to make omega-3s on their own. Instead, they obtain them from this vegetation.

Explanation:

With the exception of steroids, fatty acids are carboxylic acids that provide the structural foundation of fats, oils, and all other types of lipids. More than 70 have been found in the natural world. They are typically unbranched, have an even number of carbon atoms, and can be divided into groups based on the existence and quantity of carbon-to-carbon double bonds.

14:1 (delta 11) denotes the presence of a single double bond at carbon 11, starting at the carboxyl terminus, in the fatty acid.

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The ratio :14 (delta 11) inside the fatty acid indicates a lone double bond at carbon 11, starting at the 3'-end.

In their chloroplasts, plants such as grasses, leaves, cyanobacteria, and other flora all produce omega-3 fatty acids. Fish, animals, or humans cannot create omega-3s on their own. Instead, they get them from this facility.

Fatty acids, which are naturally acidic, are the components of oils, oils, and other lipids as well as the legos of steroids. The natural world has more than 70 that have been discovered. They can be classified into categories based on the number and amount of coal single bonds, and are often spindle-shaped.

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When one puts food coloring into water, the water will turn the color of the food coloring. Also, when you leave a cut apple out, it will change to a brown color. The options that indicate a chemical reaction are:

In the case of A, chemically speaking, the nature of the water has been altered. It is now a mixture, not water. A mixture is a combination of two or more substances that can be easily separated.

In the case of B, the process that has taken place is called Oxidation.

Redox reactions occur when the oxidation states of the substrate change. The loss of electrons or an increase in the oxidation state of a chemical or atoms within it is referred to as oxidation. Reduction is the addition of electrons or a reduction in the oxidation state of a chemical or its atoms.

Decomposition Reaction is one of the several forms of redox reactions.

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The standard entropy change for the combustion of 1 mole of diamond at room temperature is 6.22  J / K mol.

The reaction is given as :

C (diamond)  + O₂   ----->  CO₂

At room temperature the value of S°  is given as follows :

C = 2.38 J / K mol

O₂ = 205.2 J/Kmol

CO₂ = 213.8 J/Kmol

The  standard entropy change is given as :

ΔS° = ∑S° product  - ∑ S° reactant

ΔS° = ( 213.8 ) - ( 2.38 + 205.2)

ΔS° = 213.8 - 207.58

ΔS° = 6.22  J / K mol

Thus, The standard entropy change for the combustion of 1 mole of diamond at room temperature is 6.22  J / K mol.

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Answer:

There are two primary hair removal methods with electrolysis: galvanic and thermolytic. Galvanic hair removal chemically destroys the hair follicle. Thermolytic removal uses heat to destroy the follicle.

Explanation:

There are 14 valence electrons assigned to the n atom.as it forms  NH4CL lewis structure.

Lewis structure can be explained the bonding pair from the lone pair electrons.it shows non bonding electrons.hydrogen atom form one covalent bond.cl is anionic monoatomic ligand. H is a diatomic anionic ligand. Nitrogen is the least electronegative atom goes at the center.Hydrogen atoms always go on the outside of lewis structure.

In this, N has 5 valence electron.Hydrogen has 1 and cl has 7 valence electron.that gives total 14 valence electrons.cl has 3 lone pairs and n has a lone pair..

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The mass of H₂SO₄ that must dissolved in 1.08 liters of solution to make 2.69M solution is 271.52 grams.

The molarity of the substance is defined as the number of moles of solute per unit volume of solution in liters.

In this case,

The volume of the solution is 1.08 L.

The required molarity of the substance is 2.69M.

So,

we can write,

Molarity = Moles/Volume

Moles = Molariyt x volume

Moles =2.69 x 1.03

Moles = 2.77

Moles = Mass required/molar mass.

Molar mass of H₂SO₄ is 98 g/mol.

Putting values,

2.77=Mass required/98

Mass required = 271.52 grams.

So, 271.52 grams of H₂SO₄ is required to make 2.69M solution.

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Other natural therapies, such as salt water, can help soothe a sore throat. Gargling with salt water works well to destroy bacteria, reduce discomfort, and loosen mucus.

When you fix something that is broken or harmful, you enhance it. To correct the situation, a lot has been done inside. Synonyms include rectify, redress, and reform. More remedies' opposites.

The four primary categories of judicial remedies are (1) damages, (2) restitution, (3) coercive remedies, and (4) declaratory remedies. These categories are organized according to their intended use. Damages are typically used as a remedy to make up for any harm that has been done to the affected party.

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The conclusion would be that Rf value is wrong.

Rf value refers to the retention factor. It is used in Thin Layer Chromatography, which is the technique to identify molecules based on their polarity. The. rf value is the ratio of distance travelled by solute to the distance travelled by solvent.

Solute can not move faster than solvent, hence, the distance travelled is always less. This means that numerator will be less than denominator making it less than 1. In general, the rf value lies between 0 and 1. Therefore, there is something wrong in the experiment.

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if 100. ml of the solution in part 1 is concentrated by evaporation to give a final volume of 1.00 ml, the change in pH decreases by 2 pH increases by 2.

what is evaporation?

However, This procedure is therefore stated to include a shift in the liquids' condition of matter.

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The equilibrium equation for the neutralization reaction between H2SO4 and KOH in aqueous solution is

[tex]H_2SO_4 + 2KOH= > K_2SO_4 +H_2O[/tex]

Neutralization is a chemical reaction in which acids and bases react quantitatively with each other. When reacted in water, the neutralization effect works because there is no excess hydrogen or hydroxide ions in the solution.

A neutralization reaction is when an acid and a base react to form a salt with water, and H+ and OH ions mix to form water. Neutralizing strong acids and strong bases results in a pH of 7.

The reaction between an acid and a base is called a neutralization reaction, which can be thought of as a kind of substitution reaction in which the protons of an acid are replaced while being given to another species.

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If the hydrogen atom emits red, blue-green, blue, and violet light, 4 energy levels do it have in the visible region of the spectrum. Therefore, option B is correct.

The term electromagnetic spectrum can be defined as the range of frequencies of electromagnetic radiation and their respective photon energies and wavelengths.

Therefore, the four colors red, blue-green, blue, and violet light emitted by a hydrogen atom, are of four energy levels in the visible region of the electromagnetic spectrum.

Thus, option B is correct.

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Your question is incomplete, most probably your question was

If the hydrogen atom emits red, blue-green, blue, and violet light, how many energy levels does it have in the visible region of the spectrum?

A. 3

B. 4

C. 5

D. 6

The % ionization of a 2.00 m aqueous solution of the base is 0.0022%

What is pOH ?

It is a measure of the hydroxide ion (OH-) concentration of a solution. Therefore, it can be used as an indicator of the alkalinity of a substance and, in some cases, also as an indicator of electrical conductivity. pOH is the negative logarithm of hydroxide ion content and is given by the formula:

pOH = 14 - pH

OH = Kw /OH+

where Kw = self-ionization content of water.

Applying the logarithm on both sides, the more general form of the equation is: In relation to corrosion, pOH can be used as an indicator of electrolyte conductivity in galvanic cells. The conductivity of a solution depends on the concentration of ions that act as charge carriers. The higher the concentration of OH ions, the stronger the alkalinity, the higher the conductivity of the electrolyte, and the higher the rate of galvanic corrosion.

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