Chem test 1 grade 10

Question 1

solution

Answer 1

a homogeneous mixture of one or more solutes in a solvent

Question 2

solvent

Answer 2

a liquid substance (called the medium) in which solutes are dissolveds

Question 3

solute(s)

Answer 3

substance dissolved in a solvent (usually in solid form prior to dissolving)

Question 4

how to go from grams to moles

Answer 4

divide by the molar mass

Question 5

how to go from moles to grams

Answer 5

multiply by the molar mass

Question 6

solution pyramid

Answer 6

moles = concentration x volume

Question 7

moles =

Answer 7

concentration x volume
(mol)

Question 8

concentration =

Answer 8

moles / volume
(mol/L) or (M)

Question 9

volume =

Answer 9

moles / concentration
(mL or L)

Question 10

how to go from moles to particle

Answer 10

multiple by 6.02 x 10^23

Question 11

how to go from particles to moles

Answer 11

divide by 6.02 x 10^23

Question 12

concentration

Answer 12

how much substance is dissolved in a given solution - more solute per solvent, higher concentration

Question 13

molarity/concentration unit

Answer 13

moles/liters OR mmol/mL
(M)

Question 14

best method to solve

Answer 14

underline information and put into categories
remember to add units
write out the formula at the beginning
REMEMBER PYRAMID =
moles = concentration x volume

Question 15

how to go from L to mL

Answer 15

multiply by 1000

Question 16

how to go from mL to L

Answer 16

divide by 1000

Question 17

how to solve when we have two solutions (dilution)

Answer 17

M1 x V1 = M2 x V2

Where M1 is initial concentration and V1 is initial volume

Where M2 is final concentration and V2 is final volume

Question 18

how to find molar mass of a solute

Answer 18

recognize that
moles = concentration x volume

realize that molar mass is g/mol

do the grams / the amount of mol you calculated