Question

How many moles of CaCl₂ have you delivered to the flask if you add 20.53 mL of 0.511 M CaCl₂ from the buret? (Just enter the number not the units. Sig figs are graded.)

Answer 1

A the CaCl₂ solution is 0.511 M, it mean that there are 0.511 moles of CaCl₂ are present in 1000 mL. Therefore, we can consider that 0.511 moles of CaCl₂ is equals to 1000 mL

1000 mL = 0.511 moles of CaCl₂

For 20.53 mL,

20.53 mL = (20.53 x 0.511) / 1000

= 0.0104

Therefore, 0.0104 moles of CaCl₂ have been delivered to the flask