Balancing Equations

Question 1

Products words

Answer 1

Formed
Created
Precipitated (solid)

Question 2

Chemical equations/reactions use which law?

Answer 2

Law of conservation of mass

Question 3

Coefficients

Answer 3

of moles for that substance (quantity)

Question 4

How to balance equations?

Answer 4

First make sub-numbers even. Multiply the quantity of each element by coefficient in blank. There should be the same amt of each element AND same total amount on each side

Question 5

Reactants words

Answer 5

Consumed

Used up

Question 6

Chemical equations with words

Answer 6

hydrogen (g) + oxygen (g) > water

2H2 (g) + 1O2 (g) > 2H2O (l)

Question 7

What are the diatomics? (ONLY diatomic when by itself)

Answer 7

H2 N2 O2 F2 Cl2 Br2 I2 (forms a 7 in the p table, excluding H!)
Aka non polar covalent/dispersion/sigma bonds

Question 8

Ammonia

Answer 8

NH3

Question 9

Direct combination/synthesis

Answer 9

Small+small>large

Question 10

Decomposition/analysis

Answer 10

Large>small+small

Question 11

Single replacement

Answer 11

Element+compound>compound+element (one element switches place with another in product) anion>cation/cation>anion

Question 12

Double replacement

Answer 12

Compound+compound>compound+compound (one element switches place with another in product, PAIRS switch)

Question 13

Combustion

Answer 13

Compound with C and H + O2 >CO2 + H2O

Question 14

Aqueous key word

Answer 14

Water solutions (don’t put in H2O but just write aq)

Question 15

N2+H2=

Answer 15

NH3 (ammonia) exception