SOLUTION: you are asked to prepare 100 ml of a potassium permanganate solution so that a 1 part to 3 parts dilution gives a 0.5 % w/v solution. How much potassium permanganate should be used

Question 1068690: you are asked to prepare 100 ml of a potassium permanganate solution so that a 1 part to 3 parts dilution gives a 0.5 % w/v solution. How much potassium permanganate should be used?
the answer that i found was 1.5g but in my textbook it says "2g"
i thought 1 part to 3 parts means 1 part of the active ingredient and 2 parts of the diluent/water am i wrong ?
another question the ratio 1:10 does it mean 1 part of the active ingredient and 9 parts of the diluent/water or 10 parts of the diluent/water
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
p grams of the compound in 100 ml of solution is , concentration as a fraction.

1 part by volume of the concentrated solution will be added to 3 parts of water, being total of 4 parts. Consider using all 100 ml of the concentrated solution.

, keeping all in fractions.
Solve for p.

RELATED QUESTIONS
To prepare 20 mL of a 5 mg/mL solution from a stock solution of 100 mg/mL, how much stock (answered by Boreal,greenestamps,josgarithmetic,ikleyn)

Can someone help me with these problems I am so confused. 1. How many milligrams of... (answered by stanbon,rapaljer,longjonsilver)

Prepare 1 oz of drug dilution with concentration of 5mg/ml from a 50mg/ml stock bottle.... (answered by josgarithmetic)

if you have a 10% potassium chloride solution, how many grams of potassium chloride are... (answered by Shin123)

38. In preparing specimens for testing, it is often necessary to dilute the original... (answered by josmiceli)

A solution comes from the manufacturer in pure form that must be diluted before use.... (answered by josgarithmetic)

pharmacy tech student need a answer to a dilution problem. A 20% solution has been... (answered by jorel1380)

you need to prepare a 30 ml solution of a 1.6 syrup solution . You have on hand a 50%... (answered by josgarithmetic)

Theophylline, an asthma medicine, is to be prepared from an elixir with a drug... (answered by josmiceli)