现要配制pH=4.5的缓冲溶液,最理想的缓冲对是()
现要配制pH=4.5的缓冲溶液,最理想的缓冲对是()
A.NaH2PO4-Na2HPO4(pK(H2PO4-)=7.21)
B.HAc-NaAc(pK(HAc)=4.76)
C.HCOOH-HCOONa(pK(HCOOH)=3.75)
D.NH3-NH4Cl(pK(NH3)=4.75)
正确答案:HAc-NaAc(pK(HAc)=4.76)
现要配制pH=4.5的缓冲溶液,最理想的缓冲对是()
A.NaH2PO4-Na2HPO4(pK(H2PO4-)=7.21)
B.HAc-NaAc(pK(HAc)=4.76)
C.HCOOH-HCOONa(pK(HCOOH)=3.75)
D.NH3-NH4Cl(pK(NH3)=4.75)
正确答案:HAc-NaAc(pK(HAc)=4.76)
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