Preparation of 7M HCl in 100ml?

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Answer 1 · 2018-02-26T14:59:14

Well, first off, we must mention an issue of SAFETY ....

#"You add ACID to water and NEVER WATER to the acid."#

Why not?

#"Because if you spit in acid it spits back....I kid you not."#

The conc. hydrochloric acid bottle I have in front of me now claims...

#%34("m/m")#, and #rho=1.169*g*mL^-1#...and thus we work out the #"molarity"="moles of solute"/"volume of solution"#

And so working from a #1*mL# volume we gots....

#((34%xx1*mLxx1.169*g*mL^-1)/(36.46*g*mol^-1))/(1xx10^-3*L)=10.90*mol*L^-1#...

And since #C_1V_1=C_2V_2#

#V_1=(C_2V_2)/(C_1)=(7.0*mol*L^-1xx100*mL)/(10.90*mol*L^-1)=64.2*mL#...

...the which we add to #36*mL# of water....(the solution will get hot!).

AGAIN YOU ADDS ACID TO WATER AND NEVER THE REVERSE. #"CLARO?"#