Please help me

[Dyin2Live]

Seneschal

ArtemisLB

I'm in AP chemistry. I don't know if it's how you're writing it or what, but that makes very little sense to me.

The person is from the UK, therefore we probably get taught different (/better blaugh ) than Americans.

lol ye differently cos u did the calculation differently blaugh

[Seneschal]

ArtemisLB

I'm in AP chemistry. I don't know if it's how you're writing it or what, but that makes very little sense to me.

The person is from the UK, therefore we probably get taught different (/better blaugh ) than Americans.

[EgnirfcitanuL]

ArtemisLB

I'm in AP chemistry. I don't know if it's how you're writing it or what, but that makes very little sense to me.

Me or the weird stuff in the first post?

[look215]

Ack!

[ArtemisLB]

I'm in AP chemistry. I don't know if it's how you're writing it or what, but that makes very little sense to me.

[EgnirfcitanuL]

TPauSilver

Just to leach of your thread, if anyone can tell me how to convert mg dL-1 to mmol L-1 it would be much appreciated.

First I would convert mg/dL to g/L.
Second, figure out the total number of moles you have (n=m/MW)
Then take your number of moles(n) and divide by your total volume(V) then multiply by 1000 to get mM or as you typed it mmoles L-1. I hope you find this helpful!

[Church-of-Oranges]

It equals: three thousand negitive monkeys...Well I know how to balance it, but I don't know whats afterwards. sweatdrop

[Dyin2Live]

Seneschal

Firstly, the equation isn't balanced.

Ca(OH)2 + 2HCl --> CaCl2 + 2H2O.

Now, using the equation -

C2 = C1.V1/V2 (C1 = Initial concentration, V1 = Initial volume etc), you obtain -

[Ca(OH)2] = 2.0 x 26.50 / 25

Therefore the concentration of Calcium Hydroxide = 2.12 mol dm-3.

To convert from moldm-3 to gdm-3, you multiple moldm-3 by the RMM. This is from the equation moles x mr = mass.

thankyou v. much, i did have it balanced before but forgot to type that bit up
thankies again!!

[Seneschal]

TPauSilver

Just to leach of your thread, if anyone can tell me how to convert mg dL-1 to mmol L-1 it would be much appreciated.

I answered that in the reply to the first post. Moles = mass / mr.

[Seneschal]

Firstly, the equation isn't balanced.

Ca(OH)2 + 2HCl --> CaCl2 + 2H2O.

Now, using the equation -

C2 = C1.V1/V2 (C1 = Initial concentration, V1 = Initial volume etc), you obtain -

[Ca(OH)2] = 2.0 x 26.50 / 25

Therefore the concentration of Calcium Hydroxide = 2.12 mol dm-3.

To convert from moldm-3 to gdm-3, you multiple moldm-3 by the RMM. This is from the equation moles x mr = mass.

[XxPowerMolochxX]

Damn that looks very different to me, although i did take a chem 302 university course just not ago >_>.

[TPauSilver]

dyin2live

i feel abandoned no one even says sorry i don't know how to do it

the sci-tech forum is SLOW

Most of us are intelligent enough not to post just to note we can't do something.

Give it a few hours and you might have some look.

Just to leach of your thread, if anyone can tell me how to convert mg dL-1 to mmol L-1 it would be much appreciated.

[Dyin2Live]

i feel abandoned no one even says sorry i don't know how to do it

[Dyin2Live]

please sweatdrop

[Dyin2Live]

i need to find the concentration of Ca(OH)2 which should be about 1gdm-3

Ca(OH)2 + HCl ----> CaCl2 + H2O

I need my answer to be in gdm-3
i got the answer 1.06moldm-3 but it seems too wrong

Hcl conc 2.00 moldm-3

25.00 cm3 of Ca(OH)2 needed 26.50 cm3 of HCl to neutralise

PLEASE help me whee