A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 5 years ago
how much of a 1:5 stock supply you need to make 600mL of 1:12 boric acid solution
anonymous
 5 years ago
how much of a 1:5 stock supply you need to make 600mL of 1:12 boric acid solution

This Question is Closed

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0So X amount of a 1/5th conc of pure stock solution ='s 600ml of 1/12th concentrated working solution. Welcome to my daily grad school math! (Not one calculus problem oh the waste! :) ) So think of this as a ratio problem. The two sides stock = final must stay equal. Anotherwords: X ml of stock * (0.2 conc Stock solution) = 600ml final * (0.08333 conc of Final Solution) My concentration on the left is higher that the concentration of the solution on the left. So it will take less than 600ml of stock to have the same number of molecules (amount) of chemical is produced by the two numbers on the right side of the equation. Divide both sides by 0.2 conc ... X = 250 ml of the 20% Stock Boric Acid Solution and adding the rest of the solvent (water?) to acheive the final 600 ml of Boric Acid solution. This can be done with the fractions but some may recommend converting to percentages as a practice. \[\frac{1}{5}*X\space ml = \frac{1}{12}*600\space ml\space Final\space Boric \space Acid\] \[X = \frac {5}{1}*\frac{1}{12}*600\space ml=\frac{5}{2}*100\space ml=250 \space ml\space of \space stock \space BA \space\]
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.