simultaneous equations - I think.

sciencebod

Hi guys - think I've spent enough time wreaking my head with this one. Would someone give me an idea on how best to approach this one.

For a certain experiment, 100 ml solution of 8% HCl is required. The store room only has 5% HCl and 15% HCl. How many millilitres of each available solution should be mixed to get 100 ml of 8% solution?

Someone suggested I could get to the answer using simultaneous equations, but I'm still not seeing it . Or is there another way I could get there.

Thanking you's

Pherekydes

Let x equal the vol of 5% soln and y equal the vol of 15% soln.

Then,

x+y = ?

.05x + .15y = ?

Can you fill in and solve?

zl1whqvjs75cdy

Is this a maths problem or an actual lab problem? Why in the name of jaysus in working lab would you attempt such tom foolery. Just dilute the 15%. In fact even if it is a maths problem tell them to shove it and dilute the 15%. Problem solved.

Edit; Its in the maths forum. I'm a clown sorry.

sciencebod

Pherekydes wrote: »

Let x equal the vol of 5% soln and y equal the vol of 15% soln.

Then,

x+y = ?

.05x + .15y = ?

Can you fill in and solve?

Ahhh thankyouuu - will take another look at it later - thanks again for your help .

donkeyoaty0099 wrote: »

Is this a maths problem or an actual lab problem? Why in the name of jaysus in working lab would you attempt such tom foolery. Just dilute the 15%. In fact even if it is a maths problem tell them to shove it and dilute the 15%. Problem solved.

Edit; Its in the maths forum. I'm a clown sorry.

It's a maths problem - and good point - thanks for your input donkeyoaty .

ray giraffe

donkeyoaty0099 wrote: »

tell them to shove it and dilute the 15%

*Puts on project maths hat*

"Mid partial credit. 7/10"