Question

determine the dissociation constants for the acids. express the answers in proper scientific notation where appropriate. acid a: pa=5.0 a= acid b: pa=8.10

Answer 1

To find the dissociation constants (Ka) for two acids with pKa values of 5.0 and 8.10, we use the formula Ka = 10-pKa. Calculations give us Ka = 1 × 10-5 for Acid A and Ka = 7.94 × 10-9 for Acid B, indicating that Acid A is stronger.

Step-by-step explanation:

The student is asking to determine the dissociation constants for two acids, given their pKa values. The dissociation constant (Ka) for an acid is related to its pKa by the following formula: Ka = 10-pKa. A smaller pKa value indicates a stronger acid because it reflects a larger Ka value.

For Acid A with a pKa of 5.0, the dissociation constant (Ka) can be calculated as follows:

Ka = 10-5.0 = 1 × 10-5.

For Acid B with a pKa of 8.10, the dissociation constant (Ka) can be calculated as:

Ka = 10-8.10 = 7.94 × 10-9 (rounded to two decimal places).

Therefore, Acid A has a stronger dissociation constant than Acid B, making it the stronger acid of the two.