Question

You are provided with a solution containing 1.59g of substance Z (X2CO3) in 250cm3 of distilled water. Clean your burette with distilled water and then with the standard solution of Y (0.10 moldm-3) HNO3 to be used for the titration. Calculate the number of moles of HNO3 in your average titre.

a) 0.005 moles
b) 0.010 moles
c) 0.015 moles
d) 0.020 moles

Answer 1

The number of moles of HNO3 in the average titre cannot be calculated without the volume of the HNO3 used in the titration. The volume, together with the 0.10 mol/L concentration, is required for the correct calculation.

Step-by-step explanation:

To calculate the number of moles of HNO3 in the average titre during a titration, we need to multiply the volume of the titrant used in liters by the molarity of the HNO3 solution.

Since the molarity of the HNO3 solution is given as 0.10 moldm-3, simply convert this to moles per liter: 0.10 mol/L. However, the question does not provide the volume of HNO3 used in the titration, which is necessary to complete the calculation.

Without knowing the average titre volume, we cannot accurately answer which option (a, b, c, or d) represents the number of moles of HNO3.