A solution contains 35 grams of KNO3 dissolved in 100 grams of water at 40°C. How much more KNO3 would have to be added to make
it a saturated solution?
1 answer:
Answer:
32g
Explanation:
potassium nitrate has solubility of about 67g per 100g of water at 40°C, which means that potassium nitrate solution will contain 67g of dissolved salt for every 100g of water.
since at this temperature, our solution contains 35g of potassium nitrate 100g of water. The solution will be unsaturated because of the less potassium nitrate.
to make saturated solution,
mass of potassuim nitrate = 67g - 35g
= 32g
which means dissolving another 32g of potassium nitrate in solution at 40 °C will make saturated solution.
You might be interested in
Answer:
Here's what I get
Explanation:
Assume you want to use 0.5 mL of a stock solution with a concentration of 0.2 mol·L⁻¹.
You want to prepare a 0.002 mol·L⁻¹ solution.
1. Moles of Fe(NO₃)₃
2. Volume of dilute solution