题目

根据下表信息，判断0.10mol/L的下列各溶液pH值最大的是A．CH3COONa B．Na2CO3 C．Na2S D．Na3PO4酸电离常数 CH3COOHKi = 1.8×10 -5 H2CO3Ki1= 4.3×10 -7，Ki2= 5.6×10 -11 H2SKi1= 9.1×10 -8，Ki2= 1.1×10 -12 H3PO4Ki1= 7.5×10 -3，Ki2= 6.2×10 -8，Ki3= 2.2×10 -13  答案：D解析:  If we had followed his suggestion, we could have done the work better with _______ money and _______ people． [　　] A． less; fewer B． fewer; less C． little; fewer D． less; few