中学生网络课堂本课配套习题挑战模式1/5
单选题
难度系数：
1.配制一定物质的量浓度的NaCl溶液时，造成浓度偏低的原因可能是
| A: 定容摇匀后，有少量溶液外流 |
| B: 定容时，俯视液面 |
| C: 称量时，在天平托盘上放上称量纸，将NaCl固体放在纸上称量 |
| D: 溶解NaCl的烧杯未洗涤 |
一次做对，真牛！
+5奖励规则>
- 提示1：5qC55o2uYz08aW1nIHdpZHRoPTggaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvODkvODYvckJBQ0ZGWUtTMExpblN3T0FBQUJRMnUtRm1zNzg4LnBuZyI+5p2l5YiG5p6Q77yM5piv5YiG5a2Q5Lmf5bCx5piv5rq26LSo55qE6YeP5Y+R55Sf5LqG5pS55Y+Y77yM6L+Y5piv5YiG5q+N5rq25ray5Y+R55Sf5LqG5Y+Y5YyW44CC
- 答案：RA==
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
本课配套习题挑战模式2/5
单选题
难度系数：
2.下列实验操作能使实验结果偏低的是
| A: 用蒸馏水润湿的pH试纸所测定的某酸溶液的pH |
| B: 用容量瓶配制溶液，定容后摇匀液面下降，再加蒸馏水至刻度线所配制的溶液浓度 |
| C: 用仰视量筒刻度量取的一定量浓硫酸所配制的0.1mol•L-1H2SO4溶液的浓度 |
| D: 用待测液润洗的锥形瓶进行中和滴定所测定的待测液浓度 |
一次做对，真牛！
+5奖励规则>
- 提示1：5qC55o2uYz08aW1nIHdpZHRoPTggaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvODkvODYvckJBQ0ZGWUtTMExpblN3T0FBQUJRMnUtRm1zNzg4LnBuZyI+5p2l5YiG5p6Q77yM5piv5YiG5a2Q5Lmf5bCx5piv5rq26LSo55qE6YeP5Y+R55Sf5LqG5pS55Y+Y77yM6L+Y5piv5YiG5q+N5rq25ray5Y+R55Sf5LqG5Y+Y5YyW44CC
- 答案：Qg==
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
本课配套习题挑战模式3/5
单选题
难度系数：
3.某同学配制1mol•L-1的氯化钠溶液时，实际浓度偏低，原因可能是
| A: 天平空摆时，指针指向标尺的右端 |
| B: 稀释后烧杯未洗涤 |
| C: 容量瓶中含有少量蒸馏水 |
| D: 定容时俯视刻度线 |
一次做对，真牛！
+5奖励规则>
- 提示1：5qC55o2uYz08aW1nIHdpZHRoPTggaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvODkvODYvckJBQ0ZGWUtTMExpblN3T0FBQUJRMnUtRm1zNzg4LnBuZyI+5p2l5YiG5p6Q77yM5piv5YiG5a2Q5Lmf5bCx5piv5rq26LSo55qE6YeP5Y+R55Sf5LqG5pS55Y+Y77yM6L+Y5piv5YiG5q+N5rq25ray5Y+R55Sf5LqG5Y+Y5YyW44CC
- 答案：Qg==
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
本课配套习题挑战模式4/5
单选题
难度系数：
4.某学生配制一定物质的量溶度的氢氧化钠溶液时，造成所配溶液浓度偏高的原因是
| A: 所用NaOH已潮解 |
| B: 所用NaOH中含有NaCl杂质 |
| C: 向容量瓶加水定容，俯视刻度线 |
| D: 容量瓶用蒸馏水洗涤完后，未用氢氧化钠润洗 |
一次做对，真牛！
+5奖励规则>
- 提示1：5qC55o2uYz08aW1nIHdpZHRoPTggaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvODkvODYvckJBQ0ZGWUtTMExpblN3T0FBQUJRMnUtRm1zNzg4LnBuZyI+5p2l5YiG5p6Q77yM5piv5YiG5a2Q5Lmf5bCx5piv5rq26LSo55qE6YeP5Y+R55Sf5LqG5pS55Y+Y77yM6L+Y5piv5YiG5q+N5rq25ray5Y+R55Sf5LqG5Y+Y5YyW44CC
- 答案：Qw==
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
本课配套习题挑战模式5/5
单选题
难度系数：
5.配制一定物质的量浓渡的NaOH溶液时，使所配制的溶液浓度偏小的操作是①将NaOH固体放在纸上称量，再转移到烧杯中溶解
②烧杯中NaOH溶液移入容量瓶后没有洗涤烧杯
③实验用的容量瓶洗净后末干燥，里面含有少量水
④读取容量瓶液面时采用俯视．
②烧杯中NaOH溶液移入容量瓶后没有洗涤烧杯
③实验用的容量瓶洗净后末干燥，里面含有少量水
④读取容量瓶液面时采用俯视．
| A: ①② |
| B: ③④ |
| C: ①③ |
| D: ②④ |
一次做对，真牛！
+5奖励规则>
- 提示1：5qC55o2uYz08aW1nIHdpZHRoPTggaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvODkvODYvckJBQ0ZGWUtTMExpblN3T0FBQUJRMnUtRm1zNzg4LnBuZyI+5p2l5YiG5p6Q77yM5piv5YiG5a2Q5Lmf5bCx5piv5rq26LSo55qE6YeP5Y+R55Sf5LqG5pS55Y+Y77yM6L+Y5piv5YiG5q+N5rq25ray5Y+R55Sf5LqG5Y+Y5YyW44CC
- 答案：QQ==
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
