Potassium chromate is slowly added to a solution containing 0.20 m agno3 and 0.20 m ba(no3)2. describe what happens if the ksp for ag2cro4 is 1.1 × 10-12 and the ksp of bacro4 is 1.2 × 10-10.

Ag2CrO4 will first start precipitating when

BaCrO4 will start precipitating next when

Explanation:

When potassium chromate (K2CrO4) is added slowly to the solution containing AgNO3 and Ba(NO3)2, then Ag2CrO4 and BaCrO4 will precipitate.

Ksp for Ag2CrO4 =

Ksp for BaCrO4 =

Since, Ksp of AgCrO4 is less as compared to Ksp of BaCrO4, therefore, AgCrO4 will precipitate first.

[Ag]+ = 0.20 M

Ag2CrO4 will start precipitating when

[Ba]2+ = 0.20 M

BaCrO4 will start precipitating when

the mass of the cathode increases because ions from the solution get reduced to atoms and become part of the cathode.

explanation:

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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