i am having a hard time with number 1. i have attached the table they are referr

Question

i am having a hard time with number 1. i have attached the table they are referring to

C. Sulfate Precipitates and their Solubility in Strong Bases Precipitation of Sulfates. We know that sodium sulfate is a strong electrolyte, so it ionizes completely. Nazsoa(ag) 2Na (aq) sou? (aq) (R16) Pb (aq) will form a sulfate precipitate, P Now try this with each of the seven metal cations: Kr, Ba?", zn Mn'', Co Ni Fe" 1. Write out the correspoding equilibrium equations that would give rise to a sulfate solubility recipitate. Be careful to use the appropriate arrows vs. depending on solubility. Using the Kep values provided in Table 2, predict whether it would form using 0.5 M Na2SO4 and 0.10 M metal nitrate solution.

Explanation / Answer

The SO4-2 precipitates are mainly that of:

Ba+2,

since it has a ksp

Ksp of BaSO4 = [Ba+2][SO4-2]

if we use [Na2SO4] = 0.5 amd [BaNO3] = 0.1 M solutions

Calculate Q

Q = [Ba+2][SO4-2]

Q = (0.1)(0.5) = 0.05 = 5*10^-2

since Q >> KSp

there will be precipitate of BaSO4

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