Ch 7

Question 1

C2H4O2

Answer 1

Acetic acid is a weak acid

Question 2

NH3

Answer 2

Ammonia a is a weak base

Question 3

physical change

Answer 3

is a change in phase or state of matter

Question 4

chemical change

Answer 4

results in new substance

Question 5

what change is dissolving something

Answer 5

physical change

Question 6

how to find mass of a substance needed to react with another substance

Answer 6

molar mass a to moles of a to moles of b to mass of b

Question 7

limiting reactant

Answer 7

reactant that gets completely used in reaction

Question 8

excess reactant

Answer 8

reactant that isn’t completely used in reaction

Question 9

theoretical yield

Answer 9

max amount of product that can be made from an experiment taking to account limiting reactant

Question 10

percent yield

Answer 10

actual yield/theoretical yield x100

Question 11

chemical property

Answer 11

a property a substance displays only by changing its composition via chem change

Question 12

physical property

Answer 12

A property that a substance displays without changing its composition

Question 13

typical chemical changes

Answer 13

change in color or temperature

Question 14

typical physical change

Answer 14

change in state of matter

Question 15

actual yield

Answer 15

amount of product made as a result of factors like error