A Solution Is Prepared by Dissolving 0

question 109

Multiple Choice

A solution is prepared by dissolving 0.23 mol of hydrazoic acid and 0.27 mol of sodium azide in water sufficient to yield 1.00 L of solution. The addition of 0.05 mol of NaOH to this buffer solution causes the pH to increase slightly. The pH does not increase drastically because the NaOH reacts with the __________ present in the buffer solution. The K_a of hydrazoic acid is 1.9 × 10^-5.

• A)H₂O
• B)H₃O⁺
• C)azide
• D)hydrazoic acid
• E)This is a buffer solution: the pH does not change upon addition of acid or base.

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Definitions:

Progressive Income Tax

A tax system in which the rate of taxation increases as the taxable amount or income increases, making it more proportionately burdensome for wealthier individuals.

Higher Income

A level of earnings or revenue that is above average or an increase in financial earnings.

Marginal Utility

Marginal Utility is the additional satisfaction or benefit gained from consuming one more unit of a product or service.

Total Utility

Total contentment experienced through the use of a particular volume of goods or services.