Question

What is the concentration of NO3 ions when equal volume of 0.1 M AgNO3 and 0.1 M NaCl are mixed together ?

Answer 1

0.1M AgNO3 contains 0.1 moles of Ag+ and 0.1 moles of NO3- ions in 1L of solution. It was mixed with 0.1M NaCl of equal volume.

Here the quantity of NO3- is same but the volume is doubled. So its concentration will be reduced to half. So the concentration of NO3-is 0.05M