Chemistry High School

what is the mole ratio of ammonia (with a pkb of 4.75) to ammonium chloride in a buffer with a ph of 9.03 ?

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Answer 1

The mole ratio of ammonia to ammonium chloride in a buffer with a pH of 9.03 is 1.66:1.

The formula for pKb is pKb = 14 - pKa. Using this formula, we can find the pKa of ammonia as follows:pKb(NH3) = 4.75pKb + pKa = 14pKa = 9.25The pKa of ammonium ion can be found using the formula:pH = pKa + log([NH4+]/[NH3])9.03 = pKa + log([NH4+]/[NH3])pKa = 9.03 - log([NH4+]/[NH3])Using the Henderson-Hasselbalch equation, we can find the ratio of ammonium ion to ammonia in the buffer:pH = pKa + log([NH4+]/[NH3])9.03 = 9.25 + log([NH4+]/[NH3])[NH4+]/[NH3] = 1.66The mole ratio of ammonium chloride to ammonia can be found from this ratio.

Since ammonium chloride dissociates into ammonium ion and chloride ion, we need to take into account the mole ratio of chloride ion to ammonium ion. The molecular weight of ammonium chloride is 53.5 g/mol, so the mole ratio of ammonium ion to ammonium chloride is:1/(53.5/18) = 0.336The mole ratio of ammonia to ammonium chloride in the buffer is therefore:1.66/(0.336) = 4.94:1The mole ratio of ammonia to ammonium chloride in the buffer is 1.66:1.

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Related Questions

Light frequent watering practices suppress any chinch bug infestations.

True. False

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The statement that light frequent watering practices suppress any chinch bug infestations is false.

Chinch insect infestations are not controlled by sparse, infrequent watering practises.

Chinch bugs are common pests that eat grass, and irrigation practises usually have no effect on their existence.

It is not a direct technique of control, but keeping a healthy grass through adequate watering and upkeep can assist to lower the chance of chinch bug infestations indirectly.

It is vital to apply targeted techniques, such as insecticides created exclusively to get rid of chinch bugs.

Chinch insect infestations can also be avoided by routinely inspecting the lawn, using the right mowing techniques, and removing thatch accumulation.

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which of the following statements about miscible liquids is correct? i. the components form a homogeneous solution. ii. the partial pressure of each component is the vapor pressure of the mixture times the components mole fraction. iii. each component has its own vapor pressure.

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Option i. the components form a homogeneous solution is correct statements about miscible liquids.

When we talk about miscible liquids, these are liquids that can mix in any proportion without separating, given that the components form a homogeneous solution.

The following statement about miscible liquids is correct: i. the components form a homogeneous solution.

Let's look at each option one by one:i. The components form a homogeneous solution.

Mixtures of liquids that are completely soluble in each other in all proportions are called miscible liquids.

For example, ethanol and water are miscible in each other.

The mixture of the two will be a homogeneous solution where the two components are completely blended

.ii. The partial pressure of each component is the vapor pressure of the mixture times the components mole fraction.

This statement applies to the Raoult's law for ideal solutions, which holds only for solutions of non-electrolytes.

According to Raoult's law, for an ideal solution, the partial pressure of each component in the vapor phase is equal to the product of the vapor pressure of the pure component and its mole fraction in the solution.

iii. Each component has its own vapor pressure.

This is a statement about immiscible liquids rather than miscible liquids.

In immiscible liquids, the components are not soluble in each other, so each component has its own vapor pressure and forms separate layers when mixed.

In conclusion, the correct statement about miscible liquids is that the components form a homogeneous solution.

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according to the ideal gas law, what happens to the volume of a gas when the pressure doubles (all else held constant)? apex

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Pressure and volume are proportional in direct variation, with the temperature and the number of gas molecules constant.

According to the Ideal Gas Law, what happens to the volume of a gas when the pressure doubles (all else held constant)

If the pressure of a gas is doubled (all other variables being constant), the volume of the gas will be halved. The formula for the Ideal Gas Law is PV = nRT,

where P = pressure, V = volume,

n = number of moles of gas,

R = the universal gas constant, and T = temperature.

The law states that the product of pressure and volume is proportional to the absolute temperature of the gas when all other variables are constant.

In a fixed container with a fixed number of molecules, doubling the pressure reduces the volume by half. The relationship between pressure and volume is a positive linear one. Pressure and volume are proportional in direct variation, with the temperature and the number of gas molecules constant.

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