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Flashcards in Chapter 8 Deck (21):
1

Adding an inert salt (KNO3) to a sparingly soluble salt will ____increase/decrease____ the solubility of the sparingly soluble salt.

Increase

2

Adding ions (in the form of KNO3) increases the __________ of the solution. This in turn increases the ______ of the ionic atmosphere.

ionic strength

charge

3

The ionic atmosphere __________ the attraction between the Ca2+ and SO4^2-, thus ________ the solubility.

decreases

increases

4

In a solution containing an inert salt, an ______ is surrounded by excess cations and a _______ is surrounded by excess anions.

anion

cation

5

The greater the __________ of a solution, the higher the charge in the ionic atmosphere

ionic strength (u)

6

___Increasing/Decreasing____ ionic strength promotes dissociation into ions.

increasing

7

_______ _______ is a measure of the total concentration of ions in solution

ionic strength (u)

8

What is the formula for ionic strength (u)?

1/2 [C1 Z1^2 + C2 Z2^2 + ......]

9

Concentrations of ions are _______ throughout a solution.

uniform

10

The __________ ________ measures the deviation of behavior from ideality.

activity coefficient (y)

11

As ionic strength, ion charge and ion size increases, the activity coefficient ___________.

decreases

12

The activity coefficient approaches unity as the ionic strength approaches _____.

0 (zero)

13

As the magnitude of the charge of the ion increases, the departure of its activity coefficient from unity _______.

increases (careful "departure from unity")

14

The ______ the ion size, the more important activity effects become.

smaller

15

Neutral molecule do NOT have an ________ ________ because they don't have a charge.

ionic atmosphere

16

Activity coefficients are unity when the ionic strength is less than _____.

0.1 M

17

The activity of a neutral molecule will be assumed to be equal to its __________.

concentration

18

When we measure pH with a pH meter, we are attempting to measure the negative logarithm of the hydrogen ion ______, NOT its concentration.

activity

19

The ______ ______ is an algebraic statement of electroneutrality: The sum of the positive charges in solution equals the sum of the negative charges in solution.

Charge balance

20

Mass balance is also called the ________ _______, and is a statement of the conservation of matter.

Material balance

21

The mass balance states that the quantity of _____ species in a solution containing a particular atom (or group of atoms) must equal the amount of that atom (or group) delivered to the solution.

ALL