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anonymous
 5 years ago
Water must be mixed with a 15% hydrochloric acid solution to dilute the concentration to 5%. How many liters of water should be added if we need 19 liters of the 5% solution? Round to the nearest tenth. Answer is 12.7 liters..cannot figure out equation to get 12.7 liters...keep coming up with 6.33333..ect. Cannot figure out how to check problem, with answer.
anonymous
 5 years ago
Water must be mixed with a 15% hydrochloric acid solution to dilute the concentration to 5%. How many liters of water should be added if we need 19 liters of the 5% solution? Round to the nearest tenth. Answer is 12.7 liters..cannot figure out equation to get 12.7 liters...keep coming up with 6.33333..ect. Cannot figure out how to check problem, with answer.

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Owlfred
 5 years ago
Best ResponseYou've already chosen the best response.0Hoot! You just asked your first question! Hang tight while I find people to answer it for you. You can thank people who give you good answers by clicking the 'Good Answer' button on the right!

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0h+w = 19 ; h = 19w h(.15) +w(1) = 19(.05) .......................................... (19w)(.15) +w(1) = 19(.05) 2.85 .15w +w = 0.95 .85w = 1.9 w = 2.235..now where did i go wrong lol

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0is water 0 instead of 1?

dumbcow
 5 years ago
Best ResponseYou've already chosen the best response.0yes water is 0% concentration

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0(19w)(.15) +w(0) = 19(.05) 2.85 .15w = 0.95 .15w = 1.9 w = 12.666......

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0we got hard water here kol

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Your answer is very close, amistre64...

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0if we rounded it, it would get me 12.7liters..

dumbcow
 5 years ago
Best ResponseYou've already chosen the best response.0they prob rounded the answer

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Could either of you also explain how to check this problem with the answer?

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0well, by substituting it back into the original equation to see if it works out

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0amount(%) + amount(%) = total amount(%)

dumbcow
 5 years ago
Best ResponseYou've already chosen the best response.0(12.7)(.05) = (6.3)(.15) +0

dumbcow
 5 years ago
Best ResponseYou've already chosen the best response.0oops (19)(.05) = (6.3)(.15)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0I'll try amestre's equation now...if I don't come up with amestre's answer...I'll be coming back to this site definitely..maybe within the hour. :)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0amistre64, could you explain why you set up your equation the way you did, in relation to the problem? How does (19w)(.15)+w(0) relate to the problem? Sorry for asking such dumb questions...but it's late and I relate to words better than just numbers..

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0well.... we know that we want a mix of hydroacid and water that equals 19 liters; that restricts us to: h+w = 19. It is easier to solve an equation when everything is in one variable; so since we want the amount of water, lets get h in terms of w h = 19 liters  water amount (h=19w)

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0h(15%) is the strength of the hydroacid (19w)(.15) is stateing the same thing but using terms in water...

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0the rest should be self explanatory id assume

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0I'll look at the equation again,see if I can get my lightbulb on...

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0At any rate, I've saved your formula in a document amistre64, in case I can't figure it out tonight...:)

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0itll make more sense after a 4course meal :)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0I don't think I've ever had one of those...:P

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0The lightbulb is starting to spark...but it's not on quite yet..

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Okay, listening to some of Bach's music has helped turn the lightbulb on...and now I'm wondering how it can be this simple...:P

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Thanks for your help, guys...I'll definitely be using this site more often from now on, with me majoring in nursing at the moment. :)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Hold on, where did you get the 2.85 in your equation, amistre64?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0dumbcow, do you know where amistre64's 2.85 came from, in his equation?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Could somebody explain this equation step by step, all the way through to the end? Don't assume something is selfexplanatory...it's never like that with me.
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