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Chapter 4: Problem 15

Which of the following statements is(are) true? For the false statements, correct them. a. A concentrated solution in water will always contain a strong or weak electrolyte. b. A strong electrolyte will break up into ions when dissolved in water. c. An acid is a strong electrolyte. d. All ionic compounds are strong electrolytes in water.

Short Answer

Expert verified
a. True b. True c. False; corrected statement: "An acid can be either a strong or weak electrolyte." d. False; corrected statement: "Most ionic compounds are strong electrolytes in water, but some could be weak electrolytes."

Step by step solution

01

a. Statement Analysis

Statement a says: "A concentrated solution in water will always contain a strong or weak electrolyte." This statement is true as a concentrated solution in water implies the presence of a solute that exhibits ionic properties and will either be a strong or weak electrolyte.
02

b. Statement Analysis

Statement b says: "A strong electrolyte will break up into ions when dissolved in water." This statement is true. A strong electrolyte dissolves entirely in water and breaks up into its constituent ions. It means that strong electrolytes have a high degree of ionization, almost close to 100% in water. Examples include strong acids such as HCl, strong bases such as NaOH, and ionic salts such as NaCl.
03

c. Statement Analysis

Statement c says: "An acid is a strong electrolyte." This statement is false. The correct statement should be: "An acid can be either a strong or weak electrolyte." Acids are classified as strong or weak depending on their ability to ionize; strong acids such as HCl and H2SO4 have a high degree of ionization, whereas weak acids such as CH3COOH and HF have low degrees of ionization.
04

d. Statement Analysis

Statement d says: "All ionic compounds are strong electrolytes in water." This statement is false. The corrected statement should be: "Most ionic compounds are strong electrolytes in water, but some could be weak electrolytes." Ionic compounds generally dissolve in water to form ions, making them strong electrolytes most of the time. However, some ionic compounds don't dissociate completely in water making them weak electrolytes. Examples of such compounds include sparingly soluble salts like lead chloride (PbCl2) and silver chloride (AgCl).

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Most popular questions from this chapter

Some of the substances commonly used in stomach antacids are \(\mathrm{MgO}, \mathrm{Mg}(\mathrm{OH})_{2}\), and \(\mathrm{Al}(\mathrm{OH})_{3} .\) a. Write a balanced equation for the neutralization of hydrochloric acid by each of these substances. b. Which of these substances will neutralize the greatest amount of \(0.10 M \mathrm{HCl}\) per gram?

Write the balanced formula equation for the acid-base reactions that occur when the following are mixed. a. potassium hydroxide (aqueous) and nitric acid b. barium hydroxide (aqueous) and hydrochloric acid c. perchloric acid \(\left[\mathrm{HClO}_{4}(a q)\right]\) and solid iron(III) hydroxide d. solid silver hydroxide and hydrobromic acid e. aqueous strontium hydroxide and hydroiodic acid

Write the balanced formula, complete ionic, and net ionic equations for each of the following acid-base reactions. a. \(\mathrm{HNO}_{3}(a q)+\mathrm{Al}(\mathrm{OH})_{3}(s) \rightarrow\) b. \(\mathrm{HC}_{2} \mathrm{H}_{3} \mathrm{O}_{2}(a q)+\mathrm{KOH}(a q) \rightarrow\) c. \(\mathrm{Ca}(\mathrm{OH})_{2}(a q)+\mathrm{HCl}(a q) \rightarrow\)

A \(25.00-\mathrm{mL}\) sample of hydrochloric acid solution requires \(24.16 \mathrm{~mL}\) of \(0.106 M\) sodium hydroxide for complete neutralization. What is the concentration of the original hydrochloric acid solution?

Carminic acid, a naturally occurring red pigment extracted from the cochineal insect, contains only carbon, hydrogen. and oxygen. It was commonly used as a dye in the first half of the nineteenth century. It is \(53.66 \% \mathrm{C}\) and \(4.09 \% \mathrm{H}\) by mass. A titration required \(18.02 \mathrm{~mL}\) of \(0.0406 \mathrm{M} \mathrm{NaOH}\) to neutralize \(0.3602 \mathrm{~g}\) carminic acid. Assuming that there is only one acidic hydrogen per molecule, what is the molecular formula of carminic acid?
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