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1齭Ļa
AƷr BI
Cˮ@ˇI DrI
2齭ނyġɣ~Ŀǰ׃ɡs~ķNɲݻ߲ˮr׃˹@ܻأo߲˻طNOIBֳ@N׃Ҫ
ArIgĸM BЈ׃
CڄD DȻlĸ׃
Ŀе Դ }ͣ
}Ŀ[2017K]£Ka(HCOOH)=1.77104Ka(CH3COOH)=1.75105Kb(NH3H2O) =1.76105f_
AȾ0.1 molL1 HCOONaNH4Cl Һxӵ|֮ͣǰߴں
BͬȵNaOHҺքeζwepH3HCOOHCH3COOHҺKcNaOHҺwe
C0.2 molL1 HCOOHc0.1 molL1 NaOH weϺҺУc(HCOO) + c(OH) = c(HCOOH) + c(H+)
D0.2 molL1 CH3COONa c 0.1 molL1}weϺҺ(pH<7)c(CH3COO) > c(Cl ) > c(CH3COOH) > c(H+)
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Ŀе Դ }ͣ
}ĿHaving failed my French exam,I decided to___science subjects
A.stick to
B.insist on
C.concentrate on
D.adapt to
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