Single Replacement Reactions

Match the type of chemical reaction below.

• BaCl_2​+2KI −> 2KCl + BaI_2​

• Single displacement reaction

• 2KI −> 2K + I₂​  

• Decomposition reaction

• CH₄​+O₂​→CO₂​+H_2​O

• Combustion reaction

• Synthesis reaction

• Pb + FeSO₄ ----> PbSO₄ + Fe

• Double displacement reaction

What type of reaction is this?

Pb + FeSO₄ → PbSO₄ + Fe

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-1

• 2
• 1
• 3
• 4
• 5

Tags

NGSS.HS-PS1-7

A single replacement reaction occurs when one element replaces another in a compound. Using the activity series rule: “If the single element is higher on the list → Reaction occurs; if lower → No reaction.” Which prediction best applies to Zn(s) + CuSO4(aq)?

• No reaction, because Zn is below Cu in the activity series

• Reaction, because Zn is above Cu in the activity series

• Reaction, because sulfate is more reactive than copper

• No reaction, because CuSO4 is soluble

Consider the tip: “Metals replace metals (or H in acids).” Which statement correctly applies this concept to Fe(s) + HCl(aq)?

• Reaction; Fe can replace H to form FeCl2 and H2

• No reaction; metals cannot replace hydrogen from acids

• Reaction; Fe replaces Cl to form Fe2 and Cl2 gas

• No reaction; acids are unaffected by metals in single replacement

Silver is less reactive than zinc. Using the rule “The higher element kicks out the lower one,” predict the outcome for Ag(s) + Zn(NO3)2(aq).

• Reaction; Ag displaces Zn to form AgNO3 and Zn(s)

• No reaction; Ag is lower than Zn in the activity series

• Reaction; nitrate is displaced by Ag to form Ag2(NO3)

• No reaction; single replacement cannot occur with metals

Tags

NGSS.HS-PS1-2

Apply the steps: Identify the single element and the element it could replace, use the activity series, and predict. For Mg(s) + Cu(NO3)2(aq), which balanced product set is expected if the reaction occurs?

• Mg(NO3)2(aq) + Cu(s)

• CuMg(aq) + NO3−(aq)

• Mg2+(aq) + Cu2+(aq) + NO3−(aq)

• No reaction; Cu displaces Mg from Mg(NO3)2

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-1

• LiCl + Mg

• LiMgCl

• No reaction

Tags

Predicting Products

Which symbol would indicate the precipitate in a chemical equation?

• (l)

• (s)

• (g)

• (aq)

Double replacements reactions have to be checked on the metal activity series to see if they will occur.

• True

• False

Tags

NGSS.HS-PS1-2