200 ppm solution means 200 mg/liter
200 mg = (100 *0.2)/37 = 0.540 g of 37% formaldehyde
Vol of 0.540 g of 37 % formaldehyde= 0.540/1.09 = 0.496 mL of 37 % of formaldehyde
Therefore: 0.496 mL/1 liter.
ask your teacher.
take 15ml od dettol solution and add into 285 ml of water . then you wll get 5% of dettol solution
Diluted Ammonia solution can be prepared by diluted strong ammonia solution with the appropriate quantity of purified water.
Dissolve 30 g KOH in 100 mL methanol.
Dissolve slowly 50 g NaOH in 100 mL water; advertisement: sodium hydroxide solution is dangerous !
637.5 g h20. 40%=(425/425+g) and solve.
hehehe
ask your teacher.
See the two Related Questions to the left for the answer.The first is how to prepare a solution starting with a solid substance (and dissolving it). The second question is how to prepare a solution by diluting another solution.
pharmacist
To prepare 6 nM ammonium hydroxide a 30 percent solution you need to know the volume of the 30 percent solution that you have and the volume of 6nM solution you would like to make. Then use the following formula: C1V1 = C2V2 where C = concentration in moles/Liter and V = volume in liters.
12 mg
25
take 15ml od dettol solution and add into 285 ml of water . then you wll get 5% of dettol solution
125 ml 500(ml) * 0.05 = 25 25 / 0.20 = 125
Dissolve 30g of sodium chloride in 100 mL of water.
Take 10 gm oF KI dissolve it in 100ml.