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In which 0.01 M solution is phenolphthalein pink?
(1) CH3OH(aq) (3) CH3COOH(aq)
(2) Ca(OH)2(aq) (4) HNO3(aq)
The answer is (2) Ca(OH). The solution that can make phenolphthalein pink is a base. The CH3COOH and HNO3 are acid. CH3OH is a kind of alcohol and is neutral.
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