# SOLUTION TO THE 19TH MAY 2020 QUIZ QUESTION BY CATALYST.

*SOLUTIONS TO THE MAY 19TH 2020 CATALYST ONLINE QUIZ QUESTIONS*…👇🏼👇🏼👇🏼

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NUMBER  ONE…👇🏼

Another name for water (H2O) is hydrogen oxide

The conjugate acid of water is H3O^+

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NUMBER  TWO…👇🏼

ANSWER👉🏼 👉🏼 water must be present.

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NUMBER THREE…👇🏼

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NUMBER  FOUR…👇🏼

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NUMBER FIVE…👇🏼

The compound give is Al2O3.

First, we dissociate it (breaking it up)..👇🏼

Al2O3 —> *2Al^³+*  + *3(O^²–)*

The product of the concentrations of the ions is equal to the Ksp.👇🏼👇🏼

Ksp = [2Al^³+]²  x  [3O^²–]³

Now replace each ion with letter “S” which means solubility of the substance.

Therefore👇🏼

Ksp = [2S]² . [3S]³

Opening up the bracket, we have👇🏼

Ksp = 2².S² . 3³. S³

Ksp = 4 . S² . 27 . S³

Joining the like terms together, we have👇🏼👇🏼👇🏼

Ksp = (4 x 27) x (S^2+3)

Therefore…👇🏼👇🏼👇🏼

Ksp = 108S^5

NOTE THAT…👇🏼

Letter “S” stands for SOLUBILITY.

Then making solubility subject of formula, we have 👇🏼

S^5 = Ksp/108

Therefore,

S = fifth root of(Ksp/108)

Let’s now substitute the Ksp value given to us the question👇🏼

SOLUBILITY = fifth root of (8.83×10^³–/108)

SOLUBILITY = fifth root of(0.000082)

Therefore👇🏼

SOLUBILITY = 0.152✅

I AM THE CATALYST…+2348068113736.

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Notify of Inline Feedbacks May 25, 2020 1:20 pm

Chat me up via whatsapp May 22, 2020 10:13 pm

Sir please,I don't understand how you multiplied the fifth root by 0.000082,I tried it but it didn't give me,0.152

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