《无机及分析化学原理和应用》补充习题以及答案

内容发布更新时间 : 2025/5/29 15:38:36星期一 下面是文章的全部内容请认真阅读。

1.44 某水溶液在200g水中含有12.0g蔗糖(M=342),其密度为1.022 g·mL-1。试计算蔗糖的摩尔分数、质量摩尔浓度和物质的量浓度。

1.45 计算下列溶液的滴定度,以g·mL-1表示:

⑴ 0.2015 mol·L1 的HCl溶液,用来测定Na2CO3,NH3;

⑵ 0.1896 mol·L1 的NaOH溶液,用来测定HNO3,CH3COOH。

1.46 已知浓硫酸的相对密度为1.84,其中H2SO4的质量分数约为96%。如欲配制1.0L 0.20 mol·L-1的H2SO4溶液,应取这种浓硫酸多少mL?

1.47 现需2.2L 2.0 mol·L1的盐酸。问:

⑴ 应该取多少mL 质量分数为20%、密度为1.10 g·mL-1的浓盐酸来配制?

⑵ 若已有550mL 1.0mol·L1 的稀盐酸,那么应该加多少mL质量分数为20%的浓盐酸之后再冲稀?

1.48 下列各溶液中,离子强度分别等于多少?

⑴ 0.1 mol·L1 KCl溶液;

⑵ 0.2 mol·L1 K2SO4溶液;

⑶ 0.1 mol·L1 AlCl3溶液。

1.49 The fermentation of glucose may be represented by the equation:

C6H12O6(aq) → 2C2H5OH(aq) + 2CO2(g) glucose alcohol

Fermentation of one gram of glucose will give ________g of alcohol and ________g of CO2. If the

density of the CO2(g) is 1.80 g·L1, the volume of CO2 produced is ________mL.

1.50 A sample of toothpaste contains stannous fluoride, SnF2, as an additive. Analysis of a 1.340g sample gives 1.200×10-3g of F.

⑴ How much SnF2 is there in the sample?

⑵ What is the percentage of SnF2 in the sample?

1.51 What are the simplest formulas of compounds with the following compositions? ⑴ 12.6% Li, 29.2% S, 58.2% O

⑵ 24.8% Co, 29.8% Cl, 40.3% O, 5.1% H

1.52 In analyzing a different hydrate of nickel chloride, a student finds that 1.390g of the hydrate gives, after heating, 0.7580g of NiCl2, how many moles of H2O are there per mole of NiCl2 in the hydrate?

1.53 The active ingredients of a certain biscuit mix are cream of tartar, KHC4H4O6, and baking soda, NaHCO3. The reaction that occurs when the biscuits “rise” is

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