Question
What type of reaction occurs when potassium iodide (KI) is combined with lead (II) nitrate (PbNo: potassium nitrate (KNO3) and lead (II) iodide (Pbl2)? KI+PbNO3arrow KNO3+Pbl2 A. combustion B. synthesis C. single replacement D. double replacement 9.
Answer
4
(226 Votes)
Rosalind
Veteran · Tutor for 9 years
Answer
D. double replacement
Explanation
## Step1: Identify the type of reaction by looking at the reactants and products. In this case, potassium iodide (KI) reacts with lead (II) nitrate (PbNO3) to form potassium nitrate (KNO3) and lead (II) iodide (PbI2).## Step2: Recognize that in this reaction, the potassium (K) from potassium iodide (KI) and the lead (Pb) from lead (II) nitrate (PbNO3) have switched places. This is characteristic of a double replacement reaction.## Step3: Confirm this by comparing the reaction to the general form of a double replacement reaction, which is AB + CD → AD + CB. In this case, KI (AB) + PbNO3 (CD) → KNO3 (AD) + PbI2 (CB).### The formula for a double replacement reaction is: **AB + CD → AD + CB**