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

ππΌππΌππΌππΌ

NUMBER ONE…ππΌ

Another name for water (H2O) is hydrogen oxide

ANSWERππΌππΌ

The conjugate acid of water is H3O^+

ππΌππΌππΌππΌ

NUMBER TWO…ππΌ

ANSWERππΌ ππΌ water must be present.

ππΌππΌππΌππΌ

NUMBER THREE…ππΌ

ANSWERππΌππΌBRONSTED_LOWRY theory.

ππΌππΌππΌππΌ

NUMBER FOUR…ππΌ

ANSWERππΌππΌ A supersaturated solution.

ππΌππΌππΌππΌ

NUMBER FIVE…ππΌ

The compound give is Al2O3.

First, we dissociate it (breaking it up)..ππΌ

Al2O3 —> *2Al^Β³+* + *3(O^Β²β)*

The product of the concentrations of the ions is equal to the Ksp.ππΌππΌ

Ksp = [2Al^Β³+]Β² x [3O^Β²β]Β³

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

ThereforeππΌ

Ksp = [2S]Β² . [3S]Β³

Opening up the bracket, we haveππΌ

Ksp = 2Β².SΒ² . 3Β³. SΒ³

Ksp = 4 . SΒ² . 27 . SΒ³

Joining the like terms together, we haveππΌππΌππΌ

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

Therefore…ππΌππΌππΌ

Ksp = 108S^5

NOTE THAT…ππΌ

Letter “S” stands for SOLUBILITY.

Then making solubility subject of formula, we have ππΌ

S^5 = Ksp/108

Therefore,

S = fifth root of(Ksp/108)

Let’s now substitute the Ksp value given to us the questionππΌ

SOLUBILITY = fifth root of (8.83×10^Β³β/108)

SOLUBILITY = fifth root of(0.000082)

ThereforeππΌ

SOLUBILITY = 0.152β

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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