Ch 3 - solutions pg 59-61

Question 1

What does solutions mean?

Answer 1

mixtures of substances that usually are not chemically combined with each other

Question 2

What is the solute?

Answer 2

the dissolving substance in a solution

Question 3

What is the solute?

Answer 3

a dissolved substance

Question 4

What is the miscible?

Answer 4

substances that form solutions

Question 5

What is immiscible?

Answer 5

substances that do not form solutions

Question 6

What is saturated?

Answer 6

when a solution contains the maximum amount of solute at a particular temperature and pressure

Question 7

What are suspensions?

Answer 7

mixtures of substances in which the solute is made up of very large particles

Question 8

True solutions do not settle out and remain mixed without __________.

Answer 8

agitation

Question 9

All parts of solutions contain_____ _____ of solute.

Answer 9

equal amounts

Question 10

The amount of solute dissolved in the solvent is referred to as…?

Answer 10

the concentration of the substance

Question 11

Concentrations may be expressed in what ways?

Answer 11

1. parts
2. weight per volume (w/v) for liquids
3. volume per volume (v/v) for liquids
4. weight per weight (w/w) for solids

Question 12

One unit that describes the relationship of parts is called…?

Answer 12

parts per million

Question 13

parts per million is = to …?

Answer 13

1 mg of a solute in a kilogram or liter of solvent

Question 14

one parts per million is also equivalent to….?

Answer 14

1 μg in a gram or milliliter

Question 15

The most common way of expressing drug concentration when the solute is a solid and the solvent is a liquid is…?

Answer 15

weight volume (w/v)

Question 16

The concentration of most pharmaceutic preparations is expressed as ….?

Answer 16

milligrams per milliliter (mg/ml)

Question 17

Percent (percentage) means …?

Answer 17

parts of solute per 100 parts of the solution

Question 18

Percent w/v means…?

Answer 18

the number of grams of solute in 100 ml of solution

Question 19

A 100% solution (w/v) contains …?

Answer 19

100 g of solute per 100 mL of the solution or 1 g (1000 mg) of solute per 1 mL of solution (1000 mg/mL)

Question 20

To convert from a percent solution to mg/mL,…?

Answer 20

multiply the percentage by 10

i.e., a 5% Lasix solution contains 50 mg/mL

Question 21

To convert milligrams per milliliter to a percent…?

Answer 21

divide the milligrams per milliliter by 10

i.e., a Lasix solution containing 50 mg.ml is a 5% solution