Chapter 15, Electrolytes, Acids, and Bases Video Solutions, Introductory Chemistry Atoms First

Problem 1

(a) Is the compound $\mathrm{H}_{2} \mathrm{SO}_{4}$ molecular or ionic?
(b) How did you decide on your answer to part (a)?
(c) Based on your answer to part (a), would you call $\mathrm{H}_{2} \mathrm{SO}_{4}$ an electrolyte or a nonelectrolyte?
(d) An aqueous solution of $\mathrm{H}_{2} \mathrm{SO}_{4}$ causes a light bulb to light. What does this tell you about $\mathrm{H}_{2} \mathrm{SO}_{4} ?$

David Collins

Numerade Educator

02:31

Problem 2

Indicate whether each compound is an electrolyte or a nonelectrolyte in water:
(a) $\mathrm{Al}\left(\mathrm{NO}_{3}\right)_{3}$
(b) $\left(\mathrm{CH}_{3}\right)_{2} \mathrm{O}$
(c) $\left(\mathrm{NH}_{4}\right)_{2} \mathrm{SO}_{4}$
(d) $\mathrm{CH}_{3} \mathrm{OH}$
(e) $\mathrm{CuSO}_{4}$
(f) $\mathrm{KBr}$
(g) $\mathrm{HBr}$

David Collins

Numerade Educator

01:45

Problem 3

(a) Draw a beaker containing water and show what ions, if any, are present when ammonium bromide, $\mathrm{NH}_{4} \mathrm{Br}$, dissolves.
(b) Does the $\mathrm{NH}_{4} \mathrm{Br}$ dissociate? What does the fact that it does or does not dissociate tell you regarding electrolyte/nonelectrolyte classification for this compound?
(c) Add to your drawing from part (a) a light bulb attached to positive and negative wires. Indicate which way the dissolved species move.

David Collins

Numerade Educator