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Chapter 4: Problem 29

What factors qualify a compound as a salt? Specify which of the following compounds are salts: \(\mathrm{CH}_{4}\) \(\mathrm{NaF}, \mathrm{NaOH}, \mathrm{CaO}, \mathrm{BaSO}_{4}, \mathrm{HNO}_{3}, \mathrm{NH}_{3}, \mathrm{KBr} ?\)

Short Answer

Expert verified
Sodium Fluoride (NaF), Barium Sulphate (BaSO4) and Potassium Bromide (KBr) are the salts from the given list of compounds. A compound is a salt if it is made from the neutralization reaction of an acid and a base, and is composed of cations (such as Na, Ba, K) and anions (like F, SO4, Br).

Step by step solution

01

Define a Salt

A salt is a compound resulting from the neutralization reaction of an acid and a base. They are composed of cations (positively charged ions) and anions (negatively charged ions) and can be produced by a reaction from an acid and a base. The components of salts are usually in a 1:1 ratio.
02

Identify Cations and Anions

From the compounds given, list and identify which of them contain a cation and an anion. This is achieved by having knowledge or researching on the ionic state of the individual elements of the compound.
03

Identify the Salts

From the compounds investigated in step 2, ascertain which of them are salts. These would be the compounds that consist of a cation and an anion. Sodium Fluoride (NaF) is a salt as it has the cation Sodium (Na) and anion Fluoride (F). Barium Sulphate (BaSO4) is also a salt with Barium (Ba) as the cation and the Sulphate (SO4) anion. Potassium Bromide (KBr) is the third salt, with Potassium (K) as the cation and Bromide (Br) as the anion.

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Most popular questions from this chapter

Give the oxidation number of the underlined atoms in the following molecules and ions: (a) \(\underline{\mathrm{ClF}},\) (b) \(\underline{\mathrm{IF}}_{7}\), (c) \(\underline{\mathrm{CH}}_{4},\) (d) \(\underline{\mathrm{C}}_{2} \mathrm{H}_{2},\) (e) \(\underline{\mathrm{C}}_{2} \mathrm{H}_{4},\) (f) \(\mathrm{K}_{2} \mathrm{Cr} \mathrm{O}_{4},(\mathrm{~g}) \mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\) (h) \(\mathrm{KMnO}_{4},\) (i) \(\mathrm{NaHCO}_{3},(\mathrm{j}) \underline{\mathrm{L} i}_{2},(\mathrm{k}) \mathrm{NaIO}_{3},(\mathrm{l}) \mathrm{K} \underline{\mathrm{O}}_{2}\) \((\mathrm{m}) \underline{\mathrm{PF}}_{6}^{-},(\mathrm{n}) \mathrm{K} \underline{\mathrm{Au}} \mathrm{Cl}_{4}\)

A number of metals are involved in redox reactions in biological systems in which the oxidation state of the metals changes. Which of these metals are most likely to take part in such reactions: \(\mathrm{Na}, \mathrm{K}, \mathrm{Mg}, \mathrm{Ca}\) \(\mathrm{Mn}, \mathrm{Fe}, \mathrm{Co}, \mathrm{Cu}, \mathrm{Zn} ?\) Explain.

Water is an extremely weak electrolyte and therefore cannot conduct electricity. Why are we often cautioned not to operate electrical appliances when our hands are wet?

Which of the following metals can react with water? (a) \(\mathrm{Au},(\mathrm{b}) \mathrm{Li},(\mathrm{c}) \mathrm{Hg},(\mathrm{d}) \mathrm{Ca},(\mathrm{e}) \mathrm{Pt}\)

A \(1.00-\mathrm{g}\) sample of a metal \(\mathrm{X}\) (that is known to form \(\mathrm{X}^{2+}\) ions) was added to a \(0.100 \mathrm{~L}\) of \(0.500 \mathrm{M}\) \(\mathrm{H}_{2} \mathrm{SO}_{4}\). After all the metal had reacted, the remaining acid required \(0.0334 \mathrm{~L}\) of \(0.500 \mathrm{M} \mathrm{NaOH}\) solution for neutralization. Calculate the molar mass of the metal and identify the element.
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