Chemistry: The Molecular Nature of Matter
7th Edition
ISBN: 9781118516461
Author: Neil D. Jespersen, Alison Hyslop
Publisher: WILEY
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Question
Chapter 2, Problem 70RQ
Interpretation Introduction
Interpretation:
The formula for Rochelle salt which is a tetrahydrate of
Concept Information:
A substance which is made up of a definite amount of two or more elements is known as a compound.
A chemical formula of a compound helps in finding the number of atoms of the respective elements which are present in that compound.
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Some salts make hydrates when there is moisture around. Some hydrate samples can absorb lights in visible legion. Therefore, they show some colors. Thus, hydrates can be used to detect the moisture in the environment.
Let's say you are working in a laboratory with a group and you are the only student who has taken chemistry courses. Your laboratory received a sample of cobalt(II) chloride which has the formula CoCl2·xH2O. Let's say your boss asked you to find the formula of this hydrate salt sample since you are the only chemist there. From your laboratory experience, simply explain the experimental procedure you would follow to find the formula of this unknown sample.
Then, use the given data for the calculation part.
Mass of crucible: 32.27g
Mass of crucible + unknown hydrate: 33.92 g
Color of unknown hydrate: purple
Mass of crucible + anhydrous form of hydrate: 33.41 g
Color of anhydrous form: sky blue
If Epsom salt,
MgSO, · ¤H2O, is heated to 250 °C, all the water of hydration is lost. On heating a 1.590-g sample of the hydrate, 0.777 g of
MgSO, remains. How many molecules of water occur per formula unit of
MgSO4?
molecules
If “Epsom salt”, MgSO4·xH2O, is heated to 250°C, all the water of hydration is lost. On heating a 1.687 g sample of the hydrate, 0.824 g of MgSO4remains. How many molecules of water occur per formula unit of MgSO4. Write the complete formula of the hydrate and state the complete name.
Chapter 2 Solutions
Chemistry: The Molecular Nature of Matter
Ch. 2 - Practice Exercise 2.11
How many atoms of each...Ch. 2 - Prob. 2PECh. 2 - How many atoms of each clement appear on each side...Ch. 2 - Prob. 4PECh. 2 - Prob. 5PECh. 2 - Prob. 6PECh. 2 - Prob. 7PECh. 2 - Write the formulas for the compounds made from (a)...Ch. 2 - Practice Exercise 2.9 Write all the formulas for...Ch. 2 - Prob. 10PE
Ch. 2 - Prob. 11PECh. 2 - Practice Exercise 2.12
Write the formula for the...Ch. 2 - Prob. 13PECh. 2 - Prob. 14PECh. 2 - Prob. 15PECh. 2 - Prob. 16PECh. 2 - Prob. 17PECh. 2 - Write the formulas for (a) potassium chlorate, (b)...Ch. 2 - Prob. 19PECh. 2 - Prob. 20PECh. 2 - Practice Exercise 2.21
Name the following...Ch. 2 - Practice Exercise 2.22
Write formulas for the...Ch. 2 - Prob. 23PECh. 2 - Prob. 24PECh. 2 - 2.1 In the compounds formed by with chlorine, how...Ch. 2 - Prob. 2RQCh. 2 - Prob. 3RQCh. 2 - 2.4 In the refining of copper, sizable amounts of...Ch. 2 - 2.5 Why would you reasonably expect cadmium to be...Ch. 2 - 2.6 Using the symbol for nitrogen, 147N02,...Ch. 2 - Make a rough sketch of the periodic table and mark...Ch. 2 - Prob. 8RQCh. 2 - Prob. 9RQCh. 2 - Prob. 10RQCh. 2 - Which nonmetals occur as monatomic gases (i.e.,...Ch. 2 - Prob. 12RQCh. 2 - Which physical property of metalloids...Ch. 2 - Sketch the shape of the periodic table and mark...Ch. 2 - Most periodic tables have a heavy line that looks...Ch. 2 - Prob. 16RQCh. 2 - Prob. 17RQCh. 2 - Prob. 18RQCh. 2 - 2.19 What are two ways to interpret a chemical...Ch. 2 - Prob. 20RQCh. 2 - Prob. 21RQCh. 2 - 2.22 Atoms of which elements are usually...Ch. 2 - 2.23 Atoms of which elements are usually...Ch. 2 - A DNA molecule is small in actual size but...Ch. 2 - What do we mean when we say a chemical equation is...Ch. 2 - 2.26 For a chemical reaction, what do we mean by...Ch. 2 - 2.27 The combustion of a thin wire of magnesium...Ch. 2 - Describe what kind of event must occur (involving...Ch. 2 - With what kind of elements do metals react?Ch. 2 - What is an ion? How does it differ from an atom or...Ch. 2 - 2.31 Why do we use the term formula unit for ionic...Ch. 2 - Prob. 32RQCh. 2 - Prob. 33RQCh. 2 - 2.34 How many electrons has a titanium atom lost...Ch. 2 - 2.35 If an atom gains an electron to become an...Ch. 2 - 2.36 How many electrons has a nitrogen atom gained...Ch. 2 - Prob. 37RQCh. 2 - Prob. 38RQCh. 2 - Prob. 39RQCh. 2 - Prob. 40RQCh. 2 - 2.41 What are the formulas (including charges) for...Ch. 2 - Prob. 42RQCh. 2 - Prob. 43RQCh. 2 - 2.44 Write the correct formulas for the compounds...Ch. 2 - 2.45 Write the unbalanced equations for the...Ch. 2 - 2.46 Write the unbalanced equations for the...Ch. 2 - 2.47 With what kind of elements do nonmetals...Ch. 2 - Which are the only elements that exist as free,...Ch. 2 - Prob. 49RQCh. 2 - 2.50 Which kind of elements normally combine to...Ch. 2 - Prob. 51RQCh. 2 - Prob. 52RQCh. 2 - 2.53 Without referring to Table 2.6 but using the...Ch. 2 - Prob. 54RQCh. 2 - 2.55 Astatine, a member of the halogen family,...Ch. 2 - Prob. 56RQCh. 2 - Write the chemical formulas for (a) methane, (b)...Ch. 2 - Prob. 58RQCh. 2 - Prob. 59RQCh. 2 - Prob. 60RQCh. 2 - Prob. 61RQCh. 2 - What is the difference between a binary compound...Ch. 2 - Prob. 64RQCh. 2 - Prob. 65RQCh. 2 - Prob. 66RQCh. 2 - 2.67 The compound is used in the tanning of...Ch. 2 - Asbestos, a known cancer-causing agent, has a...Ch. 2 - 2.69 Epsom salts is a hydrate of magnesium...Ch. 2 - Prob. 70RQCh. 2 - Prob. 71RQCh. 2 - Prob. 72RQCh. 2 - Write the chemical formula for the molecule...Ch. 2 - Write the chemical formula for the molecule...Ch. 2 - Prob. 75RQCh. 2 - Prob. 76RQCh. 2 - 2.77 How many atoms of each element are...Ch. 2 - 2.78 How many atoms of each kind are represented...Ch. 2 - 2.79 How many atoms of each kind are represented...Ch. 2 - 2.80 How many atoms of each kind are represented...Ch. 2 - Prob. 81RQCh. 2 - How many atoms of each element are represented in...Ch. 2 - 2.83 Consider the balanced equation
(a) How many...Ch. 2 - 2.84 Consider the balanced equation for the...Ch. 2 - Prob. 85RQCh. 2 - Prob. 86RQCh. 2 - Is the following chemical equation for the...Ch. 2 - 2.88 Is the following chemical equation balanced?...Ch. 2 - 2.89 Use the periodic table, but not Table 2.2, to...Ch. 2 - 2.90 Use the periodic table, but not Table 2.2, to...Ch. 2 - Prob. 91RQCh. 2 - Prob. 92RQCh. 2 - Prob. 93RQCh. 2 - Prob. 94RQCh. 2 - Prob. 95RQCh. 2 - Prob. 96RQCh. 2 - Prob. 97RQCh. 2 - Prob. 98RQCh. 2 - Prob. 99RQCh. 2 - Prob. 100RQCh. 2 - Prob. 101RQCh. 2 - Name the following molecular compounds:...Ch. 2 - Prob. 103RQCh. 2 - Prob. 104RQCh. 2 - Prob. 105RQCh. 2 - Prob. 106RQCh. 2 - Prob. 107RQCh. 2 - Identify each of the following as molecular or...Ch. 2 - Prob. 109RQCh. 2 - Prob. 110RQCh. 2 - Prob. 111RQCh. 2 - Prob. 112RQCh. 2 - 2.113 Which of the following formulas are...Ch. 2 - Which of the following formulas are incorrect?...Ch. 2 - Prob. 115RQCh. 2 - Prob. 116RQCh. 2 - The compounds Se2S6andSe2S4 have been shown to be...Ch. 2 - Prob. 118RQCh. 2 - The following are models of molecules of two...Ch. 2 - A student obtained a sample from an experiment...Ch. 2 - 2.121 Suppose you wanted, to separate the sample...Ch. 2 - 2.122 The elements in Group 1A and Group 7A of the...Ch. 2 - Prob. 123RQCh. 2 - Prob. 124RQCh. 2 - 2.125 Write the balanced chemical equation for the...Ch. 2 - 2.126 Write the balanced gas phase chemical...Ch. 2 - Bromine is a diatomic molecule, and it has two...Ch. 2 - Prob. 128RQCh. 2 - Prob. 129RQCh. 2 - Prob. 130RQCh. 2 - Prob. 131RQCh. 2 - Explore the internet and find a reliable source of...Ch. 2 - Spreadsheet applications such as Microsoft Excel...
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