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.下列关于粗盐提纯说法正确的是
| A: 粗盐提纯时每一步都用到玻璃棒，其作用相同 |
| B: 粗盐经过溶解、过滤、蒸发、结晶后得到纯净的氯化钠 |
| C: 当蒸发到有大量固体析出时，停止加热，利用余热将液体蒸干 |
| D: 在粗盐提纯实验中还需要用到烧瓶和石棉网 |
一次做对，真牛！
+5奖励规则>
- 提示1：546w6Zi25q615omA5a2m5Lmg55qE57KX55uQ5o+Q57qv5bey57uP5LiN5YaN5piv5Yid5Lit6Zi25q6177yM5Y+q6Zmk5Y675LiN5rq254mp44CC6L+Y6ZyA6KaB6ICD6JmR5Y+v5rq25oCn5peg5py655uQ55qE6Zmk5Y6744CC
- 提示2：5b6X5Yiw57qv5YeA55qETmFDbOa6tua2suWQjue7j+iSuOWPkee7k+aZtuW+l+WIsE5hQ2zlm7rkvZPvvIzogIzokrjlj5Hmk43kvZzkuK3vvIzokrjlj5Hnmr/nmoTkvb/nlKjmmK/kuI3pnIDopoHnn7Pmo4nnvZHnmoTjgII=
- 答案：Qw==
Qe+8juWwhueyl+ebkOS4reS4jea6tuS6juawtOeahOadgui0qOmZpOWOu+WPr+mHh+eUqOi/h+a7pOazle+8jOWunumqjOatpemqpOS4uua6tuino+OAgei/h+a7pOOAgeiSuOWPke+8jOa6tuino+aTjeS9nOS4reeOu+eSg+ajkueahOS9nOeUqOaYr+aQheaLjOWKoOmAn+a6tuino++8jOi/h+a7pOaTjeS9nOS4reeOu+eSg+ajkueahOS9nOeUqOaYr+W8lea1ge+8jOiSuOWPkeaTjeS9nOS4reeOu+eSg+ajkueahOS9nOeUqOaYr+aQheaLjOS9v+a6tua2suWPl+eDreWdh+WMgO+8jOaVhUHplJnor6/vvJsgPGJyPkLvvI7nspfnm5Dnu4/ov4fmurbop6PjgIHov4fmu6TjgIHokrjlj5HjgIHnu5PmmbblkI7lvpfliLDnmoTmsK/ljJbpkqDkuK3ov5jlkKvmnInlj6/murbmgKfnprvlrZDvvIzmlYVC6ZSZ6K+v77ybPGJyPkPvvI7okrjlj5Hml7bvvIzlvZPmnInlpKfph4/mmbbkvZPmnpDlh7rml7blupTlgZzmraLliqDng63vvIznlKjkvZnng63okrjlubLmu6TmtrLvvIzku6XlhY3mmbbkvZPlj5fng63lkI7po57muoXlh7rmnaXvvIzkuI3ku4XpgKDmiJDmjZ/lpLHvvIzogIzkuJTlj6/og73lm6DmraTlj5HnlJ/mhI/lpJbkuovmlYXvvIzmlYVD5q2j56Gu77ybPGJyPkTvvI7nspfnm5Dmj5Dnuq/nmoTmraXpqqTmmK/murbop6PjgIHov4fmu6TjgIHokrjlj5HjgIHnu5PmmbbvvIznlLHmraXpqqTlj6/mjqjmtYvnlKjnmoTku6rlmajmmK/ng6fmna/jgIHluKbpk4HlnIjnmoTpk4Hmnrblj7DjgIHmu6TnurjjgIHnjrvnkoPmo5LjgIHokrjlj5Hnmr/lkozmvI/mlpfvvIzor6Xov4fnqIvkuI3pnIDliqDng63vvIzmlYXkuI3nlKjng6fnk7blkoznn7Pmo4nnvZHvvIzmlYVE6ZSZ6K+v77yOPGJyPuaVhemAiUPvvI4=
本课配套习题挑战模式2/5
单选题
难度系数：
2.关于粗盐提纯的下列说法中正确的是
| A: 溶解粗盐时，应尽量让溶液稀些，防止食盐不完全溶解 |
| B: 滤去不溶性杂质后，将滤液移至坩埚内加热浓缩 |
| C: 当蒸发到剩余少量液体时，停止加热，利用余热将液体蒸干 |
| D: 将制得晶体转移到新制过滤器中用大量水进行洗涤 |
一次做对，真牛！
+5奖励规则>
- 提示1：5Zyo57KX55uQ5o+Q57qv6L+H56iL5Lit5LiA6Iis5LiN6ZyA6KaB5rSX5rak44CC5Zug5Li65Zyo57uT5pm25LmL5YmN5bey57uP5bCG5Y+v5rq25oCn55uQ6Zmk5Y675LqG44CC
- 提示2：6JK45Y+R55qE5rq25ray5LiN6IO95aSq56iA77yM5ZCm5YiZ6ZyA6KaB5raI6ICX5b6I6ZW/5pe26Ze077yM5Lmf5rWq6LS55LqG6LWE5rqQ44CC
- 答案：Qw==
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
本课配套习题挑战模式3/5
单选题
难度系数：
3.下列关于粗盐提纯的操作中，正确的是
| A: 把浑浊的液体直接倒入蒸发皿中加热 |
| B: 开始析出大量晶体后用玻璃棒搅拌 |
| C: 待水分完全蒸干后停止加热 |
| D: 蒸发皿中出现大量晶体后停止加热 |
一次做对，真牛！
+5奖励规则>
- 提示1：5aaC5p6c5ray5L2T5Lit6L+Y5pyJ5LiN5rq254mp77yM5bqU6K+l57un57ut6L+H5ruk44CC
- 提示2：6JK45Y+R55qE6L+H56iL5Lit6ZyA6KaB5LiA55u05pCF5ouM77yM5bm25LiU5YGc5q2i5Yqg54Ot55qE5pe26Ze05Lmf5piv5LiA5Liq5piT6ZSZ54K544CC
- 答案：RA==
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
本课配套习题挑战模式4/5
单选题
难度系数：
4.为了除去已滤去泥沙的粗盐水中的Ca2+、Mg2+、SO42-，可将该粗盐水进行下列五项操作．其中正确的操作顺序是①过滤②加过量NaOH溶液③加适量盐酸④加过量Na2CO3溶液⑤加过量BaCl2溶液．
| A: ①④②⑤③ |
| B: ④①②⑤③ |
| C: ②⑤④①③ |
| D: ⑤②④③① |
一次做对，真牛！
+5奖励规则>
- 提示1：5pys6aKY6ICD5p+l57KX55uQ5o+Q57qv55qE6aG65bqP44CC5rOo5oSP56Kz6YW46ZKg5LiA5a6a5Zyo5rCv5YyW6ZKh55qE5ZCO6Z2i44CC
- 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.粗盐水过滤后仍含有可溶性的MgCl2、Na2SO4等杂质，通过如下几个实验步骤可以除去这些杂质
①加入稍过量的NaOH溶液；
②加入稍过量的Na2CO3溶液；
③滴入稀盐酸至无气泡产生；
④加入稍过量的BaCl2溶液；
⑤过滤．
正确的操作顺序是
①加入稍过量的NaOH溶液；
②加入稍过量的Na2CO3溶液；
③滴入稀盐酸至无气泡产生；
④加入稍过量的BaCl2溶液；
⑤过滤．
正确的操作顺序是
| A: ①⑤④②③ |
| B: ④①②⑤③ |
| C: ④⑤②①③ |
| D: ①②③④⑤ |
一次做对，真牛！
+5奖励规则>
- 提示1：5Zyo57KX55uQ5o+Q57qv55qE6Zmk5p2C6aG65bqP5LiK77yM5Y+q6KaB5rOo5oSP77yM5rCv5YyW6ZKh5b+F6aG75Zyo56Kz6YW46ZKg5LmL5YmN5bCx5Y+v5Lul44CC
- 答案：Qg==
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
