Question

different types. youre going to learn about the many kinds of reactions that happen in the world around us. before we jump into those, lets do a quick prediction. dont worry - this wont be graded, and well revisit it later on. take a look at the chemical reactions below and try to predict which type each one is. click on the magnifying glasses to learn a bit more about the reactions.
to predict which reaction is which, label it with a reaction type.
$2ki(aq)+pb(no_3)_2(aq)\to pbi_2(s)+2kno$
$ch_4(g)+2o_2(g)\to co_2(g)+2h_2o(g)$
$2h_2o_2(g)\to 2h_2o(l)+o_2(g)$
$2li(s)+2h_2o(l)\to 2lioh(aq)+h_2(g)$
$2co(g)+o_2(g)\to 2co_2(g)$

Explanation:

Step1: Analyze the first reaction

In the reaction \(2KI(aq)+Pb(NO_3)_2(aq)\to PbI_2(s)+2KNO_3(aq)\), the ions of two compounds exchange places. This is characteristic of a double - replacement reaction.

Step2: Analyze the second reaction

For the reaction \(CH_4(g)+2O_2(g)\to CO_2(g)+2H_2O(g)\), methane (\(CH_4\)) reacts with oxygen (\(O_2\)) to produce carbon dioxide (\(CO_2\)) and water (\(H_2O\)). This is a combustion reaction.

Step3: Analyze the third reaction

In the reaction \(2H_2O_2(g)\to 2H_2O(l)+O_2(g)\), a single compound (\(H_2O_2\)) breaks down into two simpler substances (\(H_2O\) and \(O_2\)). This is a decomposition reaction.

Step4: Analyze the fourth reaction

For the reaction \(2Li(s)+2H_2O(l)\to 2LiOH(aq)+H_2(g)\), lithium (\(Li\)) replaces hydrogen (\(H\)) in water. This is a single - replacement reaction.

Step5: Analyze the fifth reaction

In the reaction \(2CO(g)+O_2(g)\to 2CO_2(g)\), two substances (\(CO\) and \(O_2\)) combine to form a single product (\(CO_2\)). This is a combination reaction.

Answer:

1. Double replacement
2. Combustion
3. Decomposition
4. Single replacement
5. Combination