Moles of Na2CO3= 105.99g/mol0.2g =0.00199moles
Molarity=1L0.00199moles U=1.90×10−3M
Moles of NaHCO3= 84.007g/mol0.2g 0.00239moles
Molarity of = 1L0.00239moles =2.39×10−3M
pH=pKa2+log[HCO32−/pCO−2]
pH=10.25+log2.39×10−3
pH=10.25+(−0.924)=9.32
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