Double Replacement Labortory Quiz 2

What is the main driving force behind a double replacement reaction occurring?

• Formation of a gas

• Formation of a precipitate or water

• High concentration of reactants

• Reaction with oxygen

Which of the following would NOT produce a precipitate when mixed?

• Pb(NO₃)₂ + KI

• NaCl + AgNO₃

• K₂SO₄ + BaCl₂

• NaNO₃ + KCl

A student selects Na₂CO₃ and CaCl₂ as reactants. According to the solubility chart, what will be the precipitate?

• NaCl

• CaCO₃

• Na₂Cl₂

• Ca(OH)₂

If no precipitate forms, what does this suggest?

• A reaction still occurred, but it was invisible

• The products were both soluble

• The reactants were not mixed properly

• The reaction needed heat

Tags

NGSS.MS-PS1-2

What is the balanced equation for AgNO₃ reacting with NaCl?

• AgNO₃ + NaCl → AgCl + NaNO₃

• 2AgNO₃ + NaCl → 2AgCl + NaNO₃

• AgNO₃ + 2NaCl → AgCl₂ + NaNO₃

• Ag + NO₃ + Na + Cl → AgCl + NaNO₃

Tags

NGSS.HS-PS1-7

Which law is used when balancing equations?

• Law of Definite Proportions

• Law of Conservation of Mass

• Ideal Gas Law

• Law of Multiple Proportions

Tags

NGSS.HS-PS1-7

What happens if a student changes the subscripts while balancing an equation?

• The identity of the compound changes

• The reaction becomes faster

• More reactants are needed

• Nothing significant

In Ba(NO₃)₂, what is the oxidation number of Ba?

• +1

• +2

• -1

• 0

What type of ions do not participate in the net ionic equation?

• Precipitate-forming ions

• Spectator ions

• Transition metal ions

• Redox-active ions

The reaction Pb(NO₃)₂ + 2KI → PbI₂ + 2KNO₃ has which spectator ions?

• Pb²⁺ and I⁻

• K⁺ and NO₃⁻

• Pb²⁺ and NO₃⁻

• K⁺ and I⁻