(Revising for my finals and i don't understand where to use c=n/v and c1v1=c2v2. My teacher said that the answer for the question below is 2 ×10 to the power -4 moles, how?? why can't we use c1v1=c2v2)
In a titration experiment, 20 mL samples from a standard solution of 0.01 mol L sodium carbonate (Na2CO3) was titrated with hydrochloric acid (HCI) solution. The reaction required an average of 16.50 mL of HCl to reach the end-point. Calculate the amount (in moles) of Na2CO3 that has reacted with HCL​