quantitative chem

Question 1

molar mass

Answer 1

the mass in grams of one mole of that substance

Question 2

molar concentration

Answer 2

the amount of solute per unit volume of solution

Question 3

what happens during mixing

Answer 3

(mole+volume addition)
no. of moles of common particle increases
total volume increases

Question 4

what happens when diff ions mixed together

Answer 4

moles of each ion species in mixture must be determined separately (dissociation)

Question 5

synthesis reaction

Answer 5

2 simple substances combine to form a complex product

Question 6

decomposition reaction

Answer 6

1 reactant produces 2 or more products

Question 7

dissolution

Answer 7

solid placed in water breaks down into smaller particles surrounded by water molecules

Question 8

dissociation

Answer 8

ionic salt further broken down into anions + cations in water

Question 9

electrolysis

Answer 9

look at 1/2 reactions at pos+neg electrodes

Question 10

ion exchange reaction

Answer 10

2 aqueous ionic solutions mixed, cations exchange respective anions (AB + CD—> AD + BC)

Question 11

stoichiometric ratio

Answer 11

ratio of chemical substances necessary for a reaction to occur completely

Question 12

purity

Answer 12

measure of the amount of impurities found in a chemical space

Question 13

neutralisation

Answer 13

point where an acid + base have reacted so neither is in excess