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Chapter 9: Q. 9.11 (page 293)

Indicate whether aqueous solutions of each of the following solutes contain only ions, only molecules, or mostly molecules and a few ions:

a. Acetic acid, HC2H3O2, a weak electrolyte.

b. NaBr, a strong electrolyte.

c. fructose,C6H12O6, a nonelectrolyte.

Short Answer

Expert verified

(part a) Acetic acid, HC2H3O2a weak electrolyte containing mostly molecules containing ions

(part b) localid="1652522483140" NaBr, is a strong electrolyte that contains Na+and Br-ions.

(part c) Fructose (C6H12O6)dissolves in water as molecules.

Step by step solution

01

Given information (part a)

Molecules are neutral particles that are established through the bond formation of atoms of two or more elements. An ion is a positively or negatively charged particle formed by the loss or gain of electrons.

02

Find the aqueous solutions contains molecules or ions (part a).

Given:

Acetic acid(HC2H3O2), a weak electrolyte. Weak electrolytes don't completely dissociate into ions.

Acetic acid solutions are mostly molecules with a few ions.

03

Find the aqueous solutions contains molecules or ions (part b). 

Given:

NaBr, a strong electrolyte. Strong electrolytes dissociate almost completely into corresponding ions in a solution.

A NaBrsolution contains salt ions, Na+ions, and Br-ions.

04

Find the aqueous solutions contains molecules or ions (part c). 

Given:

Fructose(C6H12O6), a non-electrolyte. Non- electrolytes do not dissociate into ions.

Fructose (C6H12O6), a non-electrolyte, dissolves in the water as molecules.

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Most popular questions from this chapter

Indicate whether aqueous solutions of each of the following solutes contain only ions, only molecules, or mostly molecules and a few ions:

a. NH4Cl, a strong electrolyte.

b. ethanol, C2H6O, a nonelectrolyte.

c.HCN, hydrocyanic acid, a weak electrolyte.

Automobile exhaust is a major cause of air pollution. One pollutant is the gas nitrogen oxide, which forms from nitrogen and oxygen caves in the air of the high temperatures in an automobile engine. Once emitted into the air, nitrogen oxide reacts with oxygen to produce nitrogen dioxide, a reddish brown gas with a sharp, pungent odor that makes up smog. One component of gasoline is heptane. C7H16+a liquid which a density of0.684g/mL. In one year, a typical automobile uses 550galof gasoline and produces 411 of nitrogen oxide. (7.4. 7.8.8.6)

a. Write balanced chemical equations for the production of nitrogen oxide and nitrogen dioxide.

b. If all the nitrogen oxide emitted by one automobile is converted to nitrogen dioxide in the atmosphere, how many kilograms of nitrogen dioxide are produced in one year by a single automobile?

c. Write a balanced chemical equation for the combustion of heptane.

d. Horn many moles of gaseous CO2are produced from the gasoline used by the typical automobile in one year, assuming the gasoline is all heptane?

e. How many liters of carbon dioxide at TP are produced in one year from the gasoline used by the typical automobile?

A Ringer's solution contains the following concentrations (mEq/L)of cations: role="math" localid="1652538986943" Na+147,K+4,andCa2+4.If Cl-is the only anion in the solution, what is the Cl- concentration, in milliequivalents per liter?

Classify the solute represented in each of the following equations as a strong, weak, or nonelectrolyte:

a.CH4O(l)鉄�H2OCH4O(aq)

b.MgCl2(s)鉄�H2OMg2+(aq)+2Cl-(aq)

c.HClO(aq)鈬�H2OH+(aq)+ClO-(aq)

Calculate the mass/volume percent (m/v)for the solute in each of the following:

a. 2.50gofLiClin 40mLofLiClsolution.

b. 7.5gof casein in 20mLof low-fat milk.
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