Solution Chemistry

Question 1

What is concentration?

Answer 1

How much solute is in a solvent (ratio of solute to solvent)

Question 2

Percent by Mass

What is percent by mass(%m/m)?

Answer 2

g solute in 100g solution.

Question 3

Percent by Mass

What is the formula to percent by mass (%m/m)?

Answer 3

%by mass solute=
mass of solute(g)
÷ x100%
mass of solution(g)

Question 4

Percent by Volume

What is percent by volume (%v/v)?

Answer 4

Liquid in liquid.

Question 5

Percent by Volume

What is the formula for (%v/v)?

Answer 5

%by volume of solute=
volume of solute(ml)
÷ x100%
volume of solution(ml)

Question 6

What is percent mass by volume(%m/v)?

Answer 6

Usually #g of solute per 100mL solution.

Question 7

What is the formula for (%m/v)?

Answer 7

%mass/volume=
mass of solute(g)
÷ x100%
volume of solution(g)

Question 8

What is the use of parts per million(ppm)?

Answer 8

For small quantities.

Question 9

What is the formula for parts per million (ppm)?

Answer 9

ppm=
mass of solute(g)
÷ x10^6
mass of solution(g)

Question 10

What is the use of parts per billion(ppb)?

Answer 10

For smaller quantities

Question 11

What is the formula to parts per billion(ppb)?

Answer 11

ppb=
mass of solute(g)
÷ x10^9
mass of solution(g)

Question 12

cows milk contains 4.0 g of lactose per 100m of milk. what mass of lactose is present in one 250ml of milk

Answer 12

11.3g

Question 13

a 10% M/V salt solution is used fr making pickles. what mass of salt is present in 750ml of this solution

Answer 13

g=75g

Question 14

to make a hand cleaner, a technician mixes 30ml of antiseptic with enough liquid soap to make 70ml of solution. determine the present by volume concentration of the antiseptic in the hand cleaner.

Answer 14

43% V/V

Question 15

a solution of rubbing alcohol is labelled 60.0%(v/v). determine the volume of rubbing alcohol present in a 200ml sample of solution

Answer 15

120ml

Question 16

a bottle of insect repellent states that it has a DEFT. present by volume concentration of 25%. if you just bought a 250ml container of this product, what volume of DEFT have you purchased

Answer 16

62.5ml

Question 17

what is the formula to percent by volume

Answer 17

% volume of solute=volume of solute (ml) / volume of solute(ml) x 100%

Question 18

a solution of 15.0g of sugar dissolved in 70.0g of solution. what is the present by mass concentration of sugar in the solution

Answer 18

21.4%