# How many grams of KCl are needed to make 3.0 L of a 3.4 M solution?

In a 3.4 M solution, there are 3.4 moles per liter. If you want to make 3 liters of solution, you'll need 3 liter * 3.4 moles/liter = 10.2 moles The molar mass of KCl is 39.098 g/mole K + 35.453 g/mole Cl = 74.551 g/mole KCl To get the number of grams, multiply the number of moles by the molar mass: 10.2 moles * 74.551 g/mole KCl = 760.4202 g = 0.760 kg

### How many grams of NaCl are needed to make an NaCl solution?

It depends how strong a solution you want to make. The molecular mass of NaCl is 58.44, so for a 1 molar solution you would dissolve 58.44 grams in water and make the volume up to 1 litre. For a 0.1 mol solution you'd take 5.844g to a litre, and a 2 mol solution you'd take 116.88g to a litre of water.

### How many grams of copper II fluoride are needed to make 6.7 L of a 1.2 M solution?

It requires 8.0 grams of copper (II) fluoride to make 6.7 liters of a 1.2 M solution. The equations required to come to this conclusion as well as the rest of the answer key for this assignment can be found on the Molarity Practice Problems website. Revised Version: That is completely wrong! The answer is 820 grams. My chem teacher corrected it.

### If 2 grams of salt were used to 5 liters of water to make a chemistry solution. How many grams of salt is needed for 28 liters?

The question was asked in a roundabout way, but I think you mean that if a saturated solution of sodium chloride (salt) and water contained 2 grams of sodium chloride and 5 liters of water, than how many grams of salt would be needed to make a saturated solution with 28 liters of water. First off, the one unit you gave me was mass, and the other was volume, so technically I couldn't discover how…