Can't understand a notation.

[ObamaBinLaden]

So...i came across this:

 

.To this solution add *x-substance* in ½ gram amounts.

 

I've never seen something like that before.Maybe it's not being used in my country...So,what's that"1/2 gram amounts"?How do i calculate that?

Edited April 25, 2014 by ObamaBinLaden

[hypervalent_iodine]

Could you post the rest of the protocol? It looks like it's asking you to add your substance portion-wise rather than adding the whole lot all at once.

 

Out of curiosity, what is x substance?

[ObamaBinLaden]

Could you post the rest of the protocol? It looks like it's asking you to add your substance portion-wise rather than adding the whole lot all at once.

 

Out of curiosity, what is x substance?

And that's what i don't understand.Add x grams in 1/2 portions or add 1/2 grams?It doesn't say any amount of x substance,just that.

[hypervalent_iodine]

Could you give me a link or some sort of reference so I can look at it? It's hard to make a judgement call without a better idea of what you're doing.

[pwagen]

If there's no total amount to add, perhaps you're supposed to add half a gram at a time until you get a reaction? It's hard to tell when we don't have the full protocol, as hypervalent_iodine hinted at, and don't know what you're up to.

[michel123456]

If there's no total amount to add, perhaps you're supposed to add half a gram at a time until you get a reaction? It's hard to tell when we don't have the full protocol, as hypervalent_iodine hinted at, and don't know what you're up to.

Yes that's what I understand.

[hypervalent_iodine]

If there's no total amount to add, perhaps you're supposed to add half a gram at a time until you get a reaction?

This would be a bit odd. Proper reaction protocol will always tell you how much in total of each reagent you should be adding and of course, reactions take time. But yes, this is is all pure speculation and of no use until the OP can provide more information on what they are actually doing.