Answer:
We need 0.585 grams of NaCl to make a 100 ml solution with a concentration of 0.10 M.
Step-by-step explanation:
To determine the number of grams of NaCl necessary to make up 100 ml of a 0.10 M (molar) solution, we need to use the formula:
mass = moles x molar mass
where "moles" is the number of moles of NaCl required to make the solution and "molar mass" is the mass of one mole of NaCl.
First, we need to determine the number of moles of NaCl required to make a 0.10 M solution in 100 ml:
0.10 M = 0.10 moles/liter
Since we want to make a solution with a volume of 100 ml, or 0.1 liters, we can calculate the number of moles of NaCl as:
moles = 0.10 moles/liter x 0.1 liters = 0.01 moles
Next, we need to determine the molar mass of NaCl:
NaCl = 23.0 g/mol (for Na) + 35.5 g/mol (for Cl) = 58.5 g/mol
Now we can use the formula to find the mass of NaCl:
mass = moles x molar mass
mass = 0.01 moles x 58.5 g/mol = 0.585 g
Therefore, we need 0.585 grams of NaCl to make a 100 ml solution with a concentration of 0.10 M.