3 years ago

Which of the following best represents potential energy being converted to kinetic energy

Chemistry

1 answer:

Setler [38]3 years ago

3 0

Where are the options

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A 0.187 M weak acid solution has a pH of 3.99. Find Ka for the acid. Express your answer using two significant figures.

Anna35 [415]

Answer:

5.56 × 10⁻⁸

Explanation:

Step 1: Given data

Concentration of the weak acid (Ca): 0.187 M

pH of the solution: 3.99

Step 2: Calculate the concentration of H⁺

We will use the following expression.

pH = -log [H⁺]

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Step 3: Calculate the acid dissociation constant (Ka)

We will use the following expression.

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