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# A sample of orange juice is found to have a PH of 3.80. What is the concentratio...

### Question

A sample of orange juice is found to have a PH of 3.80. What is the concentration of the hydroxide ion in the juice?

### Options

A) 1.6 $$\times$$ 10-4

B) 6.3 $$\times$$ 10-11

C) 6.3 $$\times$$ 10-4

D) 1.6 $$\times$$ 10-11

### Explanation:

PH = - Log[ H+ ]

PH + POH =14

POH = 14 - 3.8

POH = 10.2

POH = - Log[ OH- ]

10.2 = - Log[ OH- ]

10-10.2 = [ OH- ]

[ OH- ] = 6.3 x 10-11

## Dicussion (1)

• PH = - Log[ H+ ]

PH + POH =14

POH = 14 - 3.8

POH = 10.2

POH = - Log[ OH- ]

10.2 = - Log[ OH- ]

10-10.2 = [ OH- ]

[ OH- ] = 6.3 x 10-11