Chapter 12, Solutions Video Solutions, Introductory Chemistry Atoms First

Problem 1

Classify the following as solutions or heterogeneous mixtures:
(a) A hot cup of instant coffee
(b) Chicken vegetable soup
(c) Unfiltered blood
(d) Filtered blood plasma
(e) A chromium-plated steel automobile bumper
(f) A stainless steel automobile bumper (stainless steel is prepared by combining iron, Fe, up to $30 \%$ chromium, $\mathrm{Cr}$, and smaller amounts of nickel, $\mathrm{Ni}$, and carbon, $\mathrm{C}$, and heating the mixture until it becomes molten)

David Collins

Numerade Educator

02:05

Problem 2

Identify the solvent and solute or solutes in each solution:
(a) Nail-polish remover ( $30 \%$ acetone in water)
(b) Humid air
(c) Stainless steel (see Practice Problem 12.1)
(d) Aqueous solution of aspirin

David Collins

Numerade Educator

01:13

Problem 3

The "proof" value of any liquor is equal to twice the percentage of alcohol; for example, a 50-proof liquor is $25 \%$ alcohol in water. Vodka is normally sold between 80 and 100 proof, but suppose you came across a bottle of 135 -proof vodka. Would you be justified in calling the alcohol the solvent and the water the solute? Explain.

David Collins

Numerade Educator