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Chapter 4: Q4.91P (page 181)

Predict the product(s) and write a balanced equation for each of the following redox reactions:
$(a) S r (s) + B r_{2} (l) 鈫�$
$(b) A g_{2} O (s) \overset{螖}{鈫�}$
$(c) M n (s) + C u {(N O_{3})}_{2} (a q) 鈫�$

Short Answer

Expert verified

The product and the balance equation of the given reactions are:

(a) $S r (s) + B r_{2} (l) 鈫� S r B r_{2} (s)$

(b) $2 A g_{2} O (s) \overset{螖}{鈫�} 4 A g (s) + O_{2} (g)$

(c) $M n (s) + C u {(N O_{3})}_{2} (a q) 鈫� M n {(N O_{3})}_{2} (a q) + C u (s)$

Step by step solution

01

Determine the product of the equation (a)

The given redox reaction is a combination reaction.

Strontium combines with bromine and forms strontium bromide.

It is a reaction of metal-non metal which produce ionic compound.

The given reaction is:

$S r (s) + B r_{2} (l) 鈫�$

The balanced reaction is:

$S r (s) + B r_{2} (l) 鈫� S r B r_{2} (s)$

02

Determine the product of the equation (b)

The given redox reaction is a decomposition reaction.

Silver oxide decomposes and forms silver and oxygen

The given reaction is:

$A g_{2} O (s) \overset{螖}{鈫�}$

The balanced reaction is:

$2 A g_{2} O (s) \overset{螖}{鈫�} 4 A g (s) + O_{2} (g)$

03

Determine the product of the equation (c)

The given redox reaction is a displacement reaction.

The given reaction is:

$M n (s) + C u {(N O_{3})}_{2} (a q) 鈫�$

The balanced reaction is:

$M n (s) + C u {(N O_{3})}_{2} (a q) 鈫� M n {(N O_{3})}_{2} (a q) + C u (s)$

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Most popular questions from this chapter

Describe how to determine the oxidation number of sulfur in

(a) $H_{2} S$ and (b) ${S O}_{3}^{- 2}$

In the process of salting-in, protein solubility in a dilute salt solution is increased by adding more salt. Because the protein solubility depends on the total ion concentration as well as the ion charge, salts yielding doubly charged ions are often more effective than those yielding singly charged ions. (a) How many grams of MgCl₂ must dissolve to equal the ion concentration of 12.4 g of NaCl? (b) How many grams of CaS must dissolve? (c) Which of the three salt solutions would dissolve the most protein?

There are various methods for finding the composition of an alloy (a metal-like mixture). Show that calculating the mass % of Mg in a magnesium-aluminum alloy (d = 2.40 g/cm³) gives the same answer (within rounding) using each of these methods:

(a) $a 0.263 - gsample of alloy (d of Mg = 1.74 g / {cm}^{3}; dofAl = 2.70 g / {cm}^{3});$

(b) an identical sample reacting with excess aqueous HCl forms $1.38 x 10^{- 2} mol of H_{2};$

(c) an identical sample reacting with excess O₂forms 0.483 g of oxide.

Balance each of the following redox reactions and classify it as a combination, decomposition, or displacement reaction:

$(a) M g (s) + H_{2} O (g) 鈫� M g {(O H)}_{2} (s) + H_{2} (g)$

$(b) C r {(N O_{3})}_{3} (a q) + A l (s) 鈫� A l {(N O_{3})}_{3} (a q) + C r (s)$

(c) P F_{3} (g) + F_{2} (g) 鈫� P F_{5} (g)

An auto mechanic spills 88 mL of 2.6 M H₂SO₄ solution from a rebuilt auto battery. How many milliliters of 1.6 M NaHCO₃ must be poured on the spill to react completely with the sulfuric acid?

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