Hi, I have a question on measuring ingredients. All the ingredients and procedures I find are in "parts". For example, it is like 35 parts...whatever and 4 parts...whatever. How can I determine how much to add? Is there a formula?

A "part" is arbitrary. You can assign any unit you want.

 

E.g. - for "4 parts x, 3 parts y", you might choose to mix 4ml of x and 3ml of y.

Hmmh. I prefer stoichometric amounts instead of "parts", since even though they can be made quite accurate, sometimes it's just not accurate enough.

Suppose it depends if you're making apple turnover, or gelignite.

the majority of time in Chem "parts" are measured by Weight.

 

Volume is useless as grain size is variable (even Corn Flakes say "Contents may settle during transport") )

so 35 "parts" can be 35 grams of something, just be sure that you measure the rest in grams too

 

 

edited for typos

Parts basically just means a ratio.

 

If you were going to combust some H2 and O2 to make water, you would use 2 parts hydrogen for every 1 part of oxygen, since the formula for water is H2O.

the majority of time in Chem "parts" are measured by Weight.

I should certainly hope the experimenter would choose an appropriate unit, yes.

the majority of time in Chem "parts" are measured by Weight.

 

Volume is useless as grain size is variable (even Corn Flakes say "Contents may settle during transport") )

so 35 "parts" can be 35 grams of something' date=' just be sure that you measure the rest in grams too

 

 

edited for typos[/quote']

 

Not neccesarily. Gasses and waters really don't "settle", so to speak. So if you had two parts bromine and one part mercury, you could easily used mL, dL, L, etc. as your 'part'.

Thank you very much for this information.

"Suppose it depends if you're making apple turnover, or gelignite."

 

Guess you got a point there Sayo.