Pretest - Chemical Reactions

1. Classify the chemical reaction: MgCl2 + Li2CO3 >>> MgCO3 + LiCl

Sythesis

Decomposition

Combustion

Single displacement

Double displacement

Acid base or neutralization reaction

All compounds in the reaction means DOUBLE DISPLACEMENT

Explanation

All compounds in the reaction means DOUBLE DISPLACEMENT

2. Classify the chemical reaction: P4 + 3 O2 >>> 2 P2O3

Sythesis

Decomposition

Combustion

Single disreplacement

Double replacement

Acid / base reaction

One product = SYNTHESIS REACTION

Explanation

One product = SYNTHESIS REACTION

3. Classify the chemical reaction: Pb + FeSO4 >>> PbSO4 + Fe

Sythesis

Decomposition

Combustion

Single displacement

Double displacement

Acid base or neutralization reaction

If you have an element and compound on both sides = SINGLE DISPLACEMENT

Explanation

If you have an element and compound on both sides = SINGLE DISPLACEMENT

4. Where do you find the reactants and products in a chemical reaction

Reactants >>> products

Products >>> reactants

Didn't learn that

Don't know

Reactants are on the left side of arrow and Products are on the right side of arrow

Explanation

Reactants are on the left side of arrow and Products are on the right side of arrow

5. Predict the products: CH4 + O2 >>>

CH4 + O2

O2 + H4C

H2O + CO2

H4O + CH

Carbon compound and oxygen = COMBUSTION REACTION. Products are water and carbon dioxide

Explanation

Carbon compound and oxygen = COMBUSTION REACTION. Products are water and carbon dioxide

6. Classify the chemical reaction: CaCO3 >>> CaO + CO2

Sythesis

Decomposition

Combustion

Single displacement

Double displacement

Acid base or neutralization reaction

One reactant = DECOMPOSITION REACTION

Explanation

One reactant = DECOMPOSITION REACTION

7. Classify the chemical reaction: C4H8 + O2 >>> CO2 + 6 H2O

Sythesis

Decomposition

Combustion

Single displacement

Double displacement

Acid base or neutralization reaction

O2 is a reactant and CO2 and H20 are products = COMBUSTION REACTION

Explanation

O2 is a reactant and CO2 and H20 are products = COMBUSTION REACTION

8. Classify the chemical reaction: C6H12 + 9 O2 >>> 6 CO2 + 6 H2O

Sythesis

Decomposition

Combustion

Single displacement

Double displacement

Acid base or neutralization reaction

O2 is a reactant and CO2 and H20 are products = COMBUSTION REACTION

Explanation

O2 is a reactant and CO2 and H20 are products = COMBUSTION REACTION

9. Predict the products: AlCl3 + Cs >>>

K2SO4 + H2O

AlCs + Cl

Al + ClCs

CsCl + Al

Double displacement

Acid base or neutralization reaction

element + compound reactants tells you it is going to be a Single Displacement. Switch the cations

Explanation

element + compound reactants tells you it is going to be a Single Displacement. Switch the cations

10. Classify the chemical reaction: KOH + H2SO4 >>> K2SO4 + H2O

Sythesis

Decomposition

Combustion

Single displacement

Double displacement

Acid base or neutralization reaction

Base (KOH) + acid (H2SO4) = acid base reaction

Explanation

Base (KOH) + acid (H2SO4) = acid base reaction

11. ONLY Place the coefficient in your answer___ P + ____ O2 ➥ ____ P2O5

The given equation represents the balanced chemical equation for the reaction between P and O2 to form P2O5. The coefficients in front of the chemical formulas represent the number of moles of each substance involved in the reaction. In this case, the coefficient for P is 4, indicating that 4 moles of P react. The coefficient for O2 is 5, indicating that 5 moles of O2 react. Finally, the coefficient for P2O5 is 2, indicating that 2 moles of P2O5 are formed.

Explanation

The given equation represents the balanced chemical equation for the reaction between P and O2 to form P2O5. The coefficients in front of the chemical formulas represent the number of moles of each substance involved in the reaction. In this case, the coefficient for P is 4, indicating that 4 moles of P react. The coefficient for O2 is 5, indicating that 5 moles of O2 react. Finally, the coefficient for P2O5 is 2, indicating that 2 moles of P2O5 are formed.

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