Chapter 5-1

Question 1

What is concentration?

Answer 1

the amount of solute in a given amount of solution

Question 2

What would be a reason to use a parts per million (ppm) calculation?

Answer 2

the unit is so small, it’s not practical to use larger units

Question 3

How is percent concentration defined?

Answer 3

the amount of solute in 100mL of solution

Question 4

What metric unit (s) can solute be expressed in?

Answer 4

g or mL

Question 5

If a solute is a solid, what is the expression of the %?

Answer 5

weight (w)/volume (v)
g/mL
w = the % in grams/100mL

Question 6

w/v percent concentration formula

Answer 6

weight of solute (g)/volume of solution (mL) x 100%

Question 7

If a solute is a liquid, what is the expression of the %?

Answer 7

volume (mL)/volume (v)
mL/mL
v = the % in mL/100mL

Question 8

v/v percent concentration formula

Answer 8

volum of solute (mL)/volume of solution (mL) x 100%

Question 9

What is the mathematical formula for concentration?

Answer 9

amount of solute/amount of solution

Question 10

How is parts per million expressed in w/v

Answer 10

number of micrograms of solute in 1 mL of solution

Question 11

how is parts per billion expressed in w/v

Answer 11

number of nanograms of solute per 1 mL of solution