How much of the 0.2M solution of NaCl did you dispense to measure out 3.0 grams of NaCl? Please give your answer in units of LITERS, however do not explicitly include any units in your answer.
To calculate the amount of 0.2M NaCl solution needed to measure out 3.0 grams of NaCl, we first need to determine the molar mass of NaCl.
The molar mass of NaCl is 58.44 g/mol (sodium's atomic mass is 22.99 g/mol and chlorine's atomic mass is 35.45 g/mol).
Next, we need to calculate how many moles of NaCl is in 3.0 grams of NaCl:
3.0 grams / 58.44 g/mol = 0.0513 moles
Finally, we can calculate the volume of 0.2M NaCl solution needed using the formula:
Volume = moles / molarity
Volume = 0.0513 moles / 0.2 moles/L = 0.2565 L
Therefore, you would need to dispense 0.2565 liters of the 0.2M NaCl solution to measure out 3.0 grams of NaCl.