本课配套习题挑战模式2/5
单选题
难度系数:
2.某医院需要配制生理盐水(溶质质量分数为0.9%)1000g ,下列配制过程正确的是
A: 只需要托盘天平和量筒两种仪器 |
B: 用托盘天平称取9.0g氯化钠 |
C: 配制生理盐水可以用粗盐 |
D: 用量筒量取1000mL水 |
一次做对,真牛!
+5奖励规则>
- 提示1:5pys6aKY5raJ5Y+K5a6a6YeP6K6h566X77yM6ZyA6KaB6K6h566X5Ye65rq25YmC5ZKM5rq26LSo55qE6LSo6YeP5YiG5Yir5piv5aSa5bCR44CC
- 提示2:57KX55uQ5Lmf5bCx5piv5pyJ5p2C6LSo55qE55uQ77yM55So5p2l6YWN5Yi25Yy76Zmi55So55qE55Sf55CG55uQ5rC05pi+54S25LiN5YWB6K6444CC
- 答案:Qg==
QemAiemhueaYr+mUmeivr+eahOWPmei/sO+8jOi/mOmcgOimgeeDp+adr+WSjOeOu+eSg+ajku+8mzxicj5C6YCJ6aG55piv5q2j56Gu55qE5Y+Z6L+w77yM562U5qGI6YCJ5oupQu+8mzxicj5D6YCJ6aG55piv6ZSZ6K+v55qE5Y+Z6L+w77yM6YWN572u55Sf55CG55uQ5rC055So57K+55uQ77ybPGJyPkTpgInpobnmmK/plJnor6/nmoTlj5nov7DvvIwxMDAwZ+aYr+a6tua2sueahOaAu+i0qOmHj++8jOawtOeahOi0qOmHjz0xMDAwZy05Zz05OTFn77yM5Lmf5bCx5pivOTkxbUzmsLTjgII=
本课配套习题挑战模式3/5
单选题
难度系数:
3.下列选项为配制50g溶质质量分数为5%的氯化钠溶液的步骤,其先后顺序正确的是
A: 称量—计算—溶解—转液贴签 |
B: 计算—称量—溶解—转液贴签 |
C: 计算—称量—转液贴签—溶解 |
D: 计算—溶解—称量—转液贴签 |
一次做对,真牛!
+5奖励规则>
- 提示1:5pys6aKY5peg6ZyA5a6a6YeP6K6h566X77yM5Y+q6ZyA55CG5riF5a6e6aqM5q2l6aqk5Y2z5Y+v44CC
- 答案:Qg==
6YWN5Yi25LiA5a6a6LSo6YeP5YiG5pWw55qE5rq25ray55qE5q2l6aqk5Li677ya6K6h566X4oCU56ew6YeP4oCU5rq26Kej4oCU6L2s5ray6LS0562+77yMQumAiemhueato+ehrg==
本课配套习题挑战模式4/5
单选题
难度系数:
4.现用98%的浓硫酸配制500mL溶质质量分数为20%的稀硫酸 ( 密度为 1.14g/mL)。下列说法正确的是
A: 实验中需要用到的玻璃仪器只有量筒和胶头滴管 |
B: 配制该稀硫酸需要加水400mL |
C: 配制时应将水小心地加入浓硫酸中 |
D: 该稀硫酸中,溶液质量︰溶剂质量 = 5︰4 |
一次做对,真牛!
+5奖励规则>
- 提示1:56iA6YeK55qE6Zeu6aKY5Y+v5Lul5qC55o2u4oCc56iA6YeK5YmN5ZCO5rq26LSo55qE6LSo6YeP5LiN5Y+Y4oCd5YiX5pa556iL6L+b6KGM6K6h566X
- 提示2:5a6e6aqM5pON5L2c5bi46ICD55qE5LiA5Liq6ICD54K577ya56iA6YeK5rWT56Gr6YW45pe26KaB5L+d6K+B5rq25ray5pyA56iA77yM6KaB5bCG5rWT56Gr6YW457yT5oWi5Yqg5YWl5rC05Lit44CC
- 答案:RA==
QeOAgemFjeWItua6tua2suS4gOiIrOWMheaLrOiuoeeul+OAgeensOmHj+OAgea6tuino+S4ieS4qui/h+eoi++8jOmcgOimgeeahOS4u+imgeS7quWZqOacieeDp+adr+OAgemHj+etkuOAgeeOu+eSg+ajkuWSjOiDtuWktOa7tOeuoeetie+8jOmUmeivr++8mzxicj5C44CB5Yip55So56iA6YeK5YmN5ZCO5rq26LSo55qE6LSo6YeP55u4562J77yM5Y+v5YWI5rGC5Ye66ZyA6KaB5rWT56Gr6YW455qE6LSo6YePPTUwMG1sw5cxLjE0Zy9tbMOXMjAlw7c5OCUgPTExNi4zZ++8jOWGjeiuoeeul+axguW+l+WKoOawtOi0qOmHjz01MDBtbMOXMS4xNGcvbWwtMTE2LjNnPTQ1My43Z++8jOWImemcgOawtOeahOS9k+enr+aYrzQ1My43Z8O3MWcgL21sPQ==
本课配套习题挑战模式5/5
单选题
难度系数:
5.要配制100g溶质质量分数为10%的氯化钠溶液,下列操作正确的是
A: 将10g氯化钠固体直接放在天平的托盘上称量 |
B: 用于溶解氯化钠的烧杯内壁有大量水滴 |
C: 为加快固体溶解,用玻璃棒边搅拌边碾压氯化钠晶体 |
D: 将配好的溶液倒入细口瓶中,盖紧瓶塞,并贴上标签 |
一次做对,真牛!
+5奖励规则>
- 提示1:5pys6aKY6ICD5p+l5a6e6aqM5pON5L2c77yM6KaB5piO56Gu5ZCE5Luq5Zmo55qE55So5rOV44CC
- 答案:RA==
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