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Vaselesa [24]
3 years ago
9

Which of the following pairs of compounds will react to form a precipitate? Why?

Chemistry
1 answer:
Ivanshal [37]3 years ago
4 0

Answer:

calcium chloride and silver nitrate

Explanation:

A precipitate is often formed in a double replacement reaction when the reaction yields an insoluble product.

Consider the reaction between calcium chloride and silver nitrate;

CaCl2(aq) + 2AgNO3(aq) -------->2AgCl(s) + Ca(NO3)2(aq)

AgCl is insoluble in water, hence the reaction leads to the formation of a precipitate.

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<em>pV</em> = <em>nRT </em>

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Please help, timed test, will give brainliest
OlgaM077 [116]

Answer:

The answer to your question is letter B

Explanation:

A.)                     2 AgCl + Na2S ⟶ 2 Ag2S + 2 NaCl

                Reactants           Elements              Products

                      2                         Ag                         4

                      2                          Cl                          2

                      2                          Na                         2

                      1                            S                           2

This reaction is unbalanced

B.)                       2 AgCl + Na2S ⟶ Ag2S + 2 NaCl

                Reactants           Elements              Products

                      2                         Ag                         2

                      2                          Cl                          2

                      2                          Na                         2

                      1                            S                           1

This reaction is balanced

C.)                         AgCl + Na2S ⟶ 2 Ag2S + 2 NaCl

                Reactants           Elements              Products

                      1                         Ag                         4

                      1                          Cl                          2

                      2                          Na                         2

                      1                            S                           2

This reaction is unbalanced

D.)                2 AgCl + 2 Na2S ⟶ Ag2S + NaCl

                Reactants           Elements              Products

                      2                         Ag                         4

                      2                          Cl                          1

                      4                          Na                         1

                      2                            S                          1

This reaction is unbalanced

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