Can anyone do the answers to the exam?

[Pe_me]

Would it be possible for anyone to do the answers to the exam?

[stonecold]

Do you have the exam?

[cltf]

1.A
2.B
3.C

SA
q4
a) 36.8%
b) Percentage stays the same, because the H20 lost is proportion - mass and molar mass will decrease

[Greatness]

1.A
2.B
3.C

SA
q4
a) 36.8%
b) Percentage stays the same, because the H20 lost is proportion - mass and molar mass will decrease

Yeah those are right so far, but my teahcer said that the 4B was lower... idk i did the same as well

[costa94]

can be lower or same
same if the guy doing the experiment knows that hes evaporting off the water so changes the molar mass
lower if the guy doing the experiment doesnt know so calculated amount is lower

depends on vcaa interpretation now i guess.

[IAmImmature000000]

1.A
2.B
3.C

SA
q4
a) 36.8%
b) Percentage stays the same, because the H20 lost is proportion - mass and molar mass will decrease

Fuq im screwed for that question.

[IAmImmature000000]

can be lower or same
same if the guy doing the experiment knows that hes evaporting off the water so changes the molar mass
lower if the guy doing the experiment doesnt know so calculated amount is lower

depends on vcaa interpretation now i guess.

Oh thank goodness.

[golden]

can be lower or same
same if the guy doing the experiment knows that hes evaporting off the water so changes the molar mass
lower if the guy doing the experiment doesnt know so calculated amount is lower

depends on vcaa interpretation now i guess.

Hopefully they will look into it.

[luken93]

Yeah, did same as well. If he wrote the equation of XXX.H2O - >XXX + 6H2O, surely he'd know

[The Full House]

How did you actually do question 4!??!!? It wasnt a 1:1 molar ratio was it =l coz i interpreted it like that... i didnt know what to do...

[Greatness]

You had to find the n(P) from which you can find the n(P2O5) or whatever it was :@ so simple....

[cltf]

How did you actually do question 4!??!!? It wasnt a 1:1 molar ratio was it =l coz i interpreted it like that... i didnt know what to do...

ratio is 1:2 one P2O5 to 2MgNH4PO4.6H2O, note the Phosphorus

[scocliffe09]

Would it be possible for anyone to do the answers to the exam?

More than happy to do answers, but I need the exam.
email to [email protected] anyone who has it!

[Tashi]

How did you actually do question 4!??!!? It wasnt a 1:1 molar ratio was it =l coz i interpreted it like that... i didnt know what to do...

I wrote about the equation. P2O5 + NH3 + MGSO4-7H2O -> [whatever the product was]
And then I balanced the equation (which was probably unnecessary) and got a 2 (the precipitate): 1 (P205). Then I found the mol of the precipitate, divided by 2 then found the percentage. It was so confusing though with all the concentrations and volumes in the question!

[zool3]

b) Percentage stays the same, because the H20 lost is proportion - mass and molar mass will decrease

the percentage can be lower or same? as long as you justify your reason as long as you didnt write higher!