calculate how much sodium hydroxide is needed to make a 0.5Msodium 500mls water?
To calculate how much sodium hydroxide (NaOH) is needed to make a 0.5 M (molar) concentration in a 500 mL solution of water, you need to use the equation:
Molarity (M) = moles of solute / volume of solution (in liters)
To determine the moles of NaOH needed, we rearrange the equation:
moles of solute = Molarity × volume of solution (in liters)
First, convert the volume of the solution from milliliters (mL) to liters (L):
500 mL = 500 ÷ 1000 = 0.5 L
Now, substitute the values into the equation:
moles of NaOH = 0.5 M × 0.5 L
moles of NaOH = 0.25 moles
Therefore, you would need 0.25 moles of sodium hydroxide (NaOH) to make a 0.5 M solution in 500 mL of water.