A.0.016mol/L B.0.025mol/L C.0.032mol/L D.0.050mol/L
硼砂與水的反應(yīng)是: B4O72-+5H2O=2H3BO3+2H2BO3- 用硼砂標(biāo)定HCl時(shí),硼砂與HCl的化學(xué)計(jì)量比為()
A.1:1 B.1:2 C.1:4 D.1:5
A.1.3 B.0.96 C.0.64 D.0.32