9. a) Name salt that can be prepared by precipitation

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These two ions will react and form a precipitation as barium sulfate salt.

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More examples of preparing insoluble salts:

Preparing insoluble saltsSilver chloride AgCl

'+' ionsAg+

Solution usedSilver nitrate with Ag+

Solution usedSodium chloride with Cl-

Salt precipitationSilver chloride AgC

NaCl

Explanation:

The that can be prepared by precipitation is NaCl.

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6

if you're asking what comes out, it's steam.