Answer:
8.2mL of the concentrated solution must be taken diluting to 1.30L with water
Step-by-step explanation:
The concentrated HNO₃ comes in a presentation of 70% = 15.8M
As the concentrated solution is of 15.8M and we want to obtain a 0.100M, the dilution must be of:
15.8M / 0.100M = 158 times must be the concentrated solution diluted
As the total volume we want to prepare is 1.30L, the volume of the concentrated solution must be:
1.30L / 158 = 8.2x10⁻³L =
8.2mL of the concentrated solution must be taken diluting to 1.30L with water