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Вкажіть розчин, в якому водневий показник дорівнює нулю:
H3PO4 0,2 моль/дм3
HCl 1 моль/дм3
HCl 0,1 моль/дм3
Ba(OH)2 1 моль/дм3
KOH 0,1 моль/дм3
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