Predicting+Reactions+-+Double+Replacement+Reactions

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Double replacement is a chemical reaction where postive ions switch between two compounds. Double replacements are able to produce a solid also known as a precipitate, it can also produce a gas or a molecular compound. In the types of reaction lab, we added Potassium idodie to lead (II) nitrate. The chemical equation for this can be shown as: Pb(NO3)2 + KI –› PbI2 + KNO3

As you can see the NO3- and I- switch within the compound. Since "I" is apart of BrINClOF it has a subscript of two because it is diatomic.

Qualitative Analysis Lab
If the lab above did not give you a better understanding of double replacement, the lab "Qualitative Analysis" can help educate you about what different solutions you will see in the lab. In the "Qualitative Analysis" lab there are three solutions mixed with three reagent; in the end, the results were double replacements. Each Reagent Contains Reagent A: K2CrO4 Reagent B: HCl Reagent C: NaH2PO4 Each Solution Contains Solution 1: BaCl2 Solution 2: AgNO3 Solution 3: Pb(NO3)2

When mixed the Double Replacement Reactions formed: BaCl2 + K2CrO4 -> BaCrO4 + KCl AgNO3 + K2CrO4 -> Ag2CrO4 + KNO3 AgNO3 +NaCl ->AgCl + NaNO3 AgNO3 + NaH2PO4 ->AgH2PO4 + NaNO3

Final Product For Lab

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