A 00010 M Solution of a Weak Acid,HA,with K_a = 2

question 67

Multiple Choice

A 0.0010 M solution of a weak acid,HA,with K_a = 2 * 10^-10 produces [H₃O⁺] < 10^-6 M.Which of the following equations can be used to determine [H₃O⁺]?

• A)The acid is so weak that the pH is about 7.
• B)[H₃O⁺]² + K_a [H₃O⁺] - [HA]_initialK_a = 0
• C)[H₃O⁺] = (K_w + K_a[HA]_initial)^½
• D)[H₃O⁺] = [HA]_initial
• E)[H₃O⁺] = (K_a[HA]_initial)^½

Analyze hypotheses and make decisions based on p-value and significance level criteria.

Differentiate between types of errors (Type I and Type II) and understand their implications in hypothesis testing.

Apply appropriate statistical methods to compare population proportions.

Perform hypothesis testing for single proportions and understand the relationship between test statistics and p-values.

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