Problem: Calculate the [OH−] concentration in a 0.5 M solution of potassium fluoride (KF). Ka for HF is 7.2 × 10−4.1. 6.94 × 10−12 M2. 0.5 M3. 6.0 × 10−6 M4. 3.6 × 10−11 M5. 2.64 x 10-6 M

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Calculate the [OH] concentration in a 0.5 M solution of potassium fluoride (KF). Ka for HF is 7.2 × 10−4.

1. 6.94 × 10−12 M

2. 0.5 M

3. 6.0 × 10−6 M

4. 3.6 × 10−11 M

5. 2.64 x 10-6 M