A.将溶剂蒸发掉一半 | ||
B.将溶质质量增大一倍 | ||
C.蒸发溶剂的质量为原溶液质量的
| ||
D.溶质、溶剂质量同时减少
|
1 |
2 |
m×10% |
m-0.45m |
0.2m |
m+0.1m |
1 |
2 |
m×10% |
m-0.5m |
A.再加5g硝酸钠 |
B.蒸发掉一半的溶剂 |
C.加入50g10%的硝酸钠溶液 |
D.蒸发掉25g水 |
A.95g | B.50g | C.100g | D.10g |
A.145g | B.195g | C.196g | D.245g |
A.加入食盐4g |
B.蒸发水分20g |
C.蒸发水分24g |
D.加入质量分数为8%的食盐水40g |
A.5% | B.10% | C.19% | D.9.5% |
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