titrating a strong bass, with a smo ein u new woud be harder to see with twe phe

Question

titrating a strong bass, with a smo ein u new woud be harder to see with twe pheno pn has 2. westr from pivu to Colovies. hydroxide in steps III.1-2 be How would the measured solubility of calcium to pass into the filtrate? effected if some undissolved Ca(OH was allowed 3. The laboratory ran out of magnesium nitrate (Mg(NO32), and your partner suggests substituting magnesium acetate (Mg(CH3CO202) in steps IV.1-2 to investigate the uncommon ion effect. Do you think this is a good suggestion? Why or why not? 4. Would steps III. 1-2 with a filtered saturated solution of magnesium hydroxide (Mg(OH)2) why not?

Explanation / Answer

Q2.

If some mass of Ca(OH)2 goes from the SOLUTION to the filtrate, i.e. the solid mass increases

So the actual amount of mass of Ca(OH)2 will not be the total

so the solubility will end up being LESS than it actually is

Q3.

Not really, since Acetate can either precipitate or interact with H+ ions

It is not IONIC, so it is much better to do this with another salt

Since Mg+2 and NO3- are pretty strong electrolytes ( ionic)

Acetate is molecular, so avoid using this.

Q4

Avoid using other material with OH- ins, since

Ca(OH)2 and Mg(OH)2 has each a different Ksp value, so interacting betwen each other will make the shift in equilbrium to move

So avoid using different Cation, if you are using Mg+2 use Mg and Ca for Ca+2

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