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0 votes
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in Chemistry by (69.8k points)

The pH of a 0.100 M solution of an aqueous weak acid (HA) is 3.20. The Ka for the weak acid is: 

a) 6.3 × 10–4 

b) 7.2 × 10–5 

c) 4.0 × 10–6 

d) 3.2 

e) none of these

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1 Answer

+1 vote
by (69.2k points)

c) 4.0 × 10–6

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