pharmacy tech
posted by rob .
Determine the milliliters of water needed to prepare 2 oz of a 10% solution from a 12.5% solution and distilled water.

Is that 2 fluid oz? or 2 oz in grams. I assume you mean 2 fluid oz which = 59.15 mL but check me out on that.
59.15mL x 10% = xmL x 12.5%.
solve for x. Then x mL of the 12.5% soln plus enough water to make 59.15 mL total.
Respond to this Question
Similar Questions

Pharm Tech
how many milliliters of a 5% stock solution are needed to prepare 250ml of a 2% solution? 
pharmacy tech
Determine the milliliters of water needed to prepare 2 oz of a 10% solution from a 12.5% solution and distilled water. 
math
You are a lab technician and must create 250 ml of a 17% saltsolution. a. If you have 500 ml of 28% saltsolution, how many milliliters of it should you mix with water in order to create 250 ml of a 17% saltsolution? 
Calc
You are a lab technician and must create 250 ml of a 17% saltsolution. a. If you have 500 ml of 28% saltsolution, how many milliliters of it should you mix with water in order to create 250 ml of a 17% saltsolution? 
Pharmacy math
concentrated hydrochloric acid is a 38% solution of hcl in water and has a density of 1.18g/ml. How many milliliters of concentrated hydrochloric acid are needed to prepare 500ml of a 1:200 hcl solution? 
pharmacy tech.
Prepare 500ml of a 1:5 solution using a 1:10 solution and a 1:4 solution. What quantities will be used of each stock solution to make the 1:5 solution? 
pharmacy tech.
In what proportion should you combine a 2:5 soaking solution and distilled water to create a 300 ml of a 1:20 solution? 
Chem
I got part a but part b I'm having trouble with I keep getting 56.2mL. I'm not sure what the next step is really to find part b. A. How would you prepare 250 mL of a 0.150 M solution of CoCl2 from solid CoCl2 and distilled water? 
Simple Chemistry
A.Write a brief procedure outling how would you prepare 250mL of a 0.150M solution of a CoCl2 from solid CoCl2 and distilled water b. Using the solution from part a and distilled water, how would you prepare 100ml of a 0.0600 M solution … 
Chemistry
I have to use the given concentration of 7.03 micromoles/liters to determine the concentration for the following dilutions. 1. mL stock solution2 mL distilled water8 2. mL stock solution4 mL distilled water6 3. mL stock solution6 …