Question

need help with chemistry ASAP!

Answer 1

Calculate the molarity of a solution made by adding 35.0 mL of concentrated perchloric acid (70.5 % by mass, density 1.67 g/mL) to some water in a volumetric flask, then adding water to the mark to make exactly 2000 mL of solution. (It is important to add concentrated acid or base to water, rather than the other way, to minimize splashing and maximize safety.)

Answer 2

ASAP means?

Answer 3

@Callisto earth to Calli? your still here :P?

Answer 4

I'm not sure if I get this right.
Consider:
35.0 mL of concentrated perchloric acid (70.5 % by mass, density 1.67 g/mL)
Mass of 35.0mL of solution
= 1.67x35.0
= ...

Mass of concentrated perchloric acid
= (...)(70.5%)
= xxx

No. of mole of concentrated perchloric acid
= xxx/ molar mass of perchloric acid
= yyy

Concentration
= yyy/2000 mL
= your answer!

Answer 5

let me see..

Answer 6

.0205 is that what you got?

Answer 7

not really :}

Answer 8

let me try again :>

Answer 9

ok so...it's 2.05x10^-4 ?

Answer 10

#goformit100 ASAP means as soon as possible. :)

Answer 11

@zepp :D

Answer 12

@Ala123 You got that right :|

Answer 13

@Callisto hmm but for some reason when I enter it in, it's wrong? :|

Answer 14

Then.... I'm sorry... that I can't help :(

Answer 15

aww ok :)

Answer 16

would you mind helping me with a smaller problem though ? :)