How much water is needed to dilute a solution?
na2co3+2hcl to 2 nacl +h2o + co2
Dilution for hydrochloric acid:
c1v1=c2v2
2.0M x 20ml = 1.8M x v2
v2=22ml

Does this mean 2ml of water needs to be added to 20 ml of hydrochloric acid in order to have a final concentration of 1.8M and final volume of 22ml?

Question

How much water is needed to dilute a solution?
na2co3+2hcl to 2 nacl +h2o + co2 
Dilution for hydrochloric acid: 
c1v1=c2v2 
2.0M x 20ml = 1.8M x v2 
v2=22ml

Does this mean 2ml of water needs to be added to 20 ml of hydrochloric acid in order to have a final concentration of 1.8M and final volume of 22ml?

somy · Answer

i never used this formula coz it made everything confusing to me 
instead i used to do it mathematically 
2.0 M - 20 mL
1.8 M - X
X= 18 mL 
this means that to dilute 2.0 M of HCl that was given to u in 20mLs 
u can take 18mL of this 2.0M HCl and add 2mL (to make up to 20mL) of WATER 
this will dilute it to 1.8 M 
so your final solution will be diluted HCl