A.溶质:溶剂=1:4 | B.溶质:溶液=1:5 |
C.溶剂:溶液=4:5 | D.溶质:溶剂=1:5 |
A.4.1% | B.6.0% | C.14.3% | D.3.2% |
A.蒸发掉50g水 | B.蒸发掉一半溶剂 |
C.加入20g溶质 | D.加入100g 20%的该溶液 |
A.5% | B.10% | C.20% | D.40% |
A.托盘天平、烧杯、药匙、玻璃棒、量筒 |
B.量筒、玻璃棒、烧杯 |
C.量筒、玻璃棒、烧杯、酒精灯 |
D.量筒、玻璃棒、烧杯、漏斗 |
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