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Chapter 4: Q4.12P (page 178)

Question:State whether an aqueous solution of each of the following substances conducts an electric current. Explain your reasoning.

(a) Caesium bromide (b) Hydrogen iodide

Short Answer

Expert verified

Answer

a) Yes, an aqueous solution of Caesium bromide conducts electric current.

b) Yes, an aqueous solution of Hydrogen iodide conducts electric current.

Step by step solution

01

Explain the solubility of ionic compounds in water

All the ionic compounds which dissociate into ions on dissolving in water conduct electricity because they contain charge and are free to move in the solution.

02

Determine the aqueous solution of given compounds conduct electricity or not

An aqueous solution of both the given compounds i.e.,

(a) Caesium bromide and (b) Hydrogen iodide can conduct electricity

Because both produce free moving charged ions on dissolving in water and conduct electric current.

In the case of Caesium bromide, it dissociates into CS+and Br-ions and conducts electricity.

In the case of Hydrogen iodide, it is a strong acid and dissociates completely in the water into H+and I_ ions through which it conducts electricity.

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Most popular questions from this chapter

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

(a)Sb(s)+Cl2(g)→SbCl3(s)

(b)AsH3(g)→As(s)+H2(g)

(c)Zn(s)+Fe(NO3)2(aq)→Zn(NO3)2(aq)+Fe(s)

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

aCas+H2Ol→CaOH2aq+H2g

bNaNO3s→NaNO2s+O2g

cC2H2g+H2g→C2H6g

To study a marine organism, a biologist prepares a 1.00-kg sample to simulate the ion concentrations in seawater. She mixes 26.5 g of NaCl, 2.40 g of MgCl2, 3.35 g of MgSO4, 1.20 g of CaCl2, 1.05 g of KCl, 0.315 g of NaHCO3, and 0.098 g of NaBr in distilled water.

(a) If the density of the solution is 1.025 g/cm3, what is the molarity of each ion?

(b) What is the total molarity of alkali metal ions?

(c) What is the total molarity of alkaline earth metal ions?

(d) What is the total molarity of anions?

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

(a)Mg(s)+H2O(g)→Mg(OH)2(s)+H2(g)

(b)Cr(NO3)3(aq)+Al(s)→Al(NO3)3(aq)+Cr(s)

(c)PF3(g)+F2(g)→PF5(g)

Mixtures of CaCl2 and NaCl are used to melt ice on roads. A dissolved 1.9348-g sample of such a mixture was analyzed by using excess Na2C2O4 to precipitate the Ca2+ as CaC2O4. The CaC2O4 was dissolved in sulfuric acid, and the resulting H2C2O4 was titrated with 37.68mL of 0.1019M KMnO4 solution.

(a) Write the balanced net ionic equation for the precipitation reaction.

(b) Write the balanced net ionic equation for the titration reaction. (See Sample Problem 4.11.)

(c) What is the oxidizing agent?

(d) What is the reducing agent?

(e) Calculate the mass percent of CaCl2 in the original sample.
See all solutions

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