112. Задачка по химии №011 220
Which of the solutions with a concentration of components of 0.1 mol/dm3 should be taken to obtain the indicated pH value (<5):
a) NaHCO3 Na2CO3
b) CH3COOH CH3COONa
c) Na2HPO4 NaH2PO4
d) C6H5COOH C6H5COONa
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