# Problem: A new potential heart medicine, code-named X-281, is being tested by a pharmaceutical company, Pharma-pill. As a research technician at Pharma-pill, you are told that X-281 is a monoprotic weak acid, but because of security concerns, the actual chemical formula must remain top secret. The company is interested in the drug's Ka value because only the dissociated form of the chemical is active in preventing cholesterol buildup in arteries.To find the pKa of X-281, you prepare a 0.089 M test solution of X-281 at 25.0 ∘C. The pH of the solution is determined to be 2.40. a. What is the pKa of X-281? Express your answer numerically.At 25∘C, for any conjugate acid-base pairpKa + pKb = 14.00b. What is pKb of the conjugate base of X-281? (Assume 25 ∘C.) Express your answer numerically.

###### Problem Details

A new potential heart medicine, code-named X-281, is being tested by a pharmaceutical company, Pharma-pill. As a research technician at Pharma-pill, you are told that X-281 is a monoprotic weak acid, but because of security concerns, the actual chemical formula must remain top secret. The company is interested in the drug's Ka value because only the dissociated form of the chemical is active in preventing cholesterol buildup in arteries.

To find the pKa of X-281, you prepare a 0.089 M test solution of X-281 at 25.0 C. The pH of the solution is determined to be 2.40.

At 25C, for any conjugate acid-base pair

pKa + pKb = 14.00

b. What is pKb of the conjugate base of X-281? (Assume 25 C.) Express your answer numerically.

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Weak Acids concept. If you need more Weak Acids practice, you can also practice Weak Acids practice problems.

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Our tutors rated the difficulty ofA new potential heart medicine, code-named X-281, is being t...as medium difficulty.

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