Biology; Chemistry; Physics: Post your doubts here!

[princess Anu]

No,Calcium hydroxide is soluble.

No. It was:

Ca(OH)2 + H+ --> Ca+2 + H2O

Ca(OH)2 is insoluble. I made a mistake too here!
Just found out. .-.

 

[Dark Destination]

No,Calcium hydroxide is soluble.

It's not.

 

[princess Anu]

It is .
what is limewater then?
Calcium carbonate is insoluble.

 

[asadalam]

It's not.

https://answers.yahoo.com/question/index?qid=20100224210728AAbUl4d

Its SLIGHTLY soluble,but i dont think it means that it would have that neutralisation reaction,you may be right.

 

[Dark Destination]

It is .
what is limewater then?
Calcium carbonate is insoluble.

All Hydroxides are insoluble except for Sodium, Potassium, Ammonium. Google it.

And idk, but that's the answer. I checked in a previous past paper.

 

[***amd***]

It's not.

it is.

 

[***amd***]

All Hydroxides are insoluble except for Sodium, Potassium, Ammonium. Google it.

And idk, but that's the answer. I checked in a previous past paper.

except for K, Na, Ca, Mg and NH3 rest of OHs are insoluble.

 

[Faizan Muhammmad]

YIPEEEEEEEEEEEEEE

 

[Dark Destination]

except for K, Na, Ca, Mg and NH3 rest of OHs are insoluble.

Magnesium hydroxide is soluble? :O Seriously?

 

[***amd***]

Magnesium hydroxide is soluble? :O Seriously?

yes.

 

[Dark Destination]

YIPEEEEEEEEEEEEEE
View attachment 43584

THANKYOU! :O

OMG. We're right!

 

[princess Anu]

No Mg is not soluble :/. Just that along with k,Na,Nh3, Ba(Oh)2 and Ca(OH)2 are soluble.

 

[Dark Destination]

YIPEEEEEEEEEEEEEE
View attachment 43584

How did you find this, so fast?

 

[Faizan Muhammmad]

How did you find this, so fast?

I searched mark schemes to see if it had come before

 

[Dark Destination]

I searched mark schemes to see if it had come before

Which year and which question?

 

[Faizan Muhammmad]

Which year and which question?

5070_s10_ms22 ) B10 )c ) i

 

[Dark Destination]

5070_s10_ms22 ) B10 )c ) i

And what about that loss is nitrogen content one? I wrote ammonia gas is produced and lost. It was for 2 marks.

 

[Lilly2318]

And what about that loss is nitrogen content one? I wrote ammonia gas is produced and lost. It was for 2 marks.

u wrote correct. did u write it reacts with the hydroxide and escapes and with this takes way nitrogen

 

[Dark Destination]

u wrote correct. did u write it reacts with the hydroxide and escapes and with this takes way nitrogen

Yeah, i wrote about the reaction too..

 

[exploded diper]

le question


le anwer...
Q10:b


i know this isnt a maths thread but i couldnt find any other place to put it...