Answer: The double displacement reaction among the given equations is:
2NaBr + Ca(OH)2 -> CaBr2 + 2NaOH
Step-by-step explanation:
n this reaction, sodium bromide (NaBr) reacts with calcium hydroxide (Ca(OH)2) to produce calcium bromide (CaBr2) and sodium hydroxide (NaOH).
Here's a step-by-step breakdown of the reaction:
1. We have 2 molecules of sodium bromide (NaBr) and 1 molecule of calcium hydroxide (Ca(OH)2) as the reactants.
2. The sodium ions (Na+) in sodium bromide and the calcium ions (Ca2+) in calcium hydroxide switch places.
3. As a result, we get 1 molecule of calcium bromide (CaBr2) and 2 molecules of sodium hydroxide (NaOH) as the products.
4. The balanced equation for this reaction is 2NaBr + Ca(OH)2 -> CaBr2 + 2NaOH.
In this double displacement reaction, the positive ions (sodium and calcium) exchange places to form two new compounds (calcium bromide and sodium hydroxide). Double displacement reactions often occur when two ionic compounds react and swap ions.