Unit 2

Question 1

Photosynthesis

Answer 1

6CO2 + 6H2O + Sun Energy => C6H12O6 + 6O2

Question 2

Cellular Respiration

Answer 2

6O2 + C6H12O6 => 6H20 + 6CO2 + Energy (ATP)

Question 3

Combustion

Answer 3

Fuel (contains C & H) + O2 => CO2 + H2O + Energy (Heat or Light)

Fire Triangle:
- Oxidizing agent (oxygen)
- Heat (Ignition Temperature)
- Fuel (Usually material - parchment paper, wood, etc)

Removing any components results on stopping of fire

Question 4

Acid

Answer 4

Hydrogen atom (+) and non-metals (-)
HCl, HNO3, H2CO3

Dissociation equation: H2(CO3) + H2O=> 2H+(aq) + 1(CO3) -2 (aq)

Question 5

Bases

Answer 5

Metals (+) and Hydroxide (OH-)
NaOH, KOH, Al(OH)3

Dissociation equation: Ca(OH)2 + H2O => Ca+2 (aq) + 2OH- (aq)

Question 6

Salts

Answer 6

Metals (+) and non metals (-)
NaCl, AgNO3, CaCl2

Dissociation equation: Ca(Cl)2(s) + H2O => Ca+2 (aq) + 2Cl- (aq)

Question 7

Acid Base Neutralization

Answer 7

Acid (aq) + Base (aq) => Salt (aq) + Water

Question 8

Law of Conservation of Mass

Answer 8

Total mass of reactants = Total mass of products

Ignore coefficients