A.18.4% | B.71.4% | C.81.6% | D.28.6% |
2.24L |
22.4L/mol |
80 |
x |
2 |
0.2g |
46 |
m |
2 |
0.2g |
0.7mol-0.2mol |
0.7mol |
A.根据硅元素守恒,生成沉淀23.4g |
B.所得溶液pH<7 |
C.根据钠元素守恒,溶液中NaCI物质的量浓度为2mol/L |
D.所得溶液c(Na+)>e(C l-)+2c(SiO32-)+c(HSiO3-) |
A.8.64g | B.9.20g | C.9.00g | D.9.44g |
A.3mL | B.9.5mL | C.15mL | D.27.5mL |
A.0.4mol/L | B.0.5mol/L | C.0.6mol/L | D.1mol/L |
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