Double Replacement Labortory Quiz

What is the primary reason for using a solubility chart in this lab?

• To determine if a reaction is exothermic

• To identify if a precipitate will form

• To check if the reactants contain covalent bonds

• To predict gas production

In a double replacement reaction, what must occur for a reaction to be considered successful?

• A gas must form

• A covalent bond must break

• A precipitate, gas, or water must form

• The products must always be soluble

Which of the following compounds is always soluble in water?

• AgCl

• BaSO₄

• NaNO₃

• PbI₂

A double replacement reaction between BaCl₂ and Na₂SO₄ will result in:

• A gas forming

• No reaction

• A precipitate of BaSO₄

• An acid-base neutralization

What is the balanced chemical equation for the reaction between Pb(NO₃)₂ and KI?

• Pb(NO₃)₂ + KI → PbI₂ + 2KNO₃

• Pb(NO₃)₂ + 2KI → PbI₂ + 2KNO₃

• 2Pb(NO₃)₂ + KI → 2PbI₂ + KNO₃

• Pb(NO₃)₂ + 2KI → 2PbI₂ + KNO₃

Tags

NGSS.HS-PS1-7

When balancing a double replacement reaction, which part of the equation should be adjusted?

• Subscripts

• Chemical formulas of products

• Coefficients

• Ionic charges

What charge must all compounds in the final equation maintain?

• Positive

• Negative

• Neutral

• Variable

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

• +1

• +2

• -1

• 0

Which of the following statements about spectator ions is true?

• They participate directly in the reaction.

• They appear in the net ionic equation.

• They remain unchanged in solution.

• They form a precipitate.

In the reaction between AgNO₃ and NaCl, which ion is a spectator ion?

• Na⁺

• Ag⁺

• Cl⁻

• AgCl