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When aqueous solutions of __________ are mixed, a precipitate forms. select one:
a. k2so4 and crcl3
b. nai and kbr
c. li2co3 and csi
d. koh and ba(no3)2 incorrect
e. nibr2 and agno3?

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Erythrosin17
I believe the correct answer would be E. When aqueous solutions of NiBr 2 and AgNO3 are mixed, a precipitate forms. As these two solutions are being mixed a reaction would happen resulting to two new compounds which are nickel nitrate and silver bromide. The reaction would be:

NiBr2 + AgNO3 = NiNO3 + AgBr2 

The precipitate that would be formed would be the silver bromide since most of the silver compound are not or has low solubility in water while most of the nitrate compounds are very soluble in water. Most likely, it would be the silver bromide that is the precipitate.

When aqueous solutions of [tex]\rm NiBr_2\;and\;AgNO_3[/tex]  are mixed, a precipitate form.

A precipitation can occur when two solutions containing different salts are mixed, and a cation/anion pair in the resulting combined solution forms an insoluble salt; this salt then precipitates out of solution.

In the given combination,

[tex]\rm K_2SO_4\;and\;CrCl_3[/tex] : The reaction will result in Group 1A compounds which are soluble.

[tex]\rm NaI\;and\;KBr[/tex] : The reaction will result in Group 1A compounds which are soluble.

[tex]\rm Li_2CO_3\;and\;CSi[/tex] : carbonates with group 1A elements becomes soluble.

[tex]\rm NiBr_2\;and\;AgNO_3[/tex] : The product will be a halide with Ag which are insoluble in water, and thus precipitates out.

When aqueous solutions of [tex]\rm NiBr_2\;and\;AgNO_3[/tex]  are mixed, a precipitate form.

For more information about precipitate formation, refer to the link:

https://brainly.com/question/11259455?referrer=searchResults

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