Question

A chemist must prepare 350. ml of 95.0 mm aqueous barium chlorate working solution. she'll do this by pouring out some 0.190 mol/l aqueous barium chlorate stock solution into a graduated cylinder and diluting it with stilled water. calculate the volume in ml of the barium chlorate stock solution that the chemist should pour out

Answer 1

The chemist should pour out 175 mL of the barium chlorate stock solution.

Step-by-step explanation:

To calculate the volume of the barium chlorate stock solution that the chemist should pour out, we can use the dilution equation:

(stock concentration) x (stock volume) = (final concentration) x (final volume)

In this case, the stock concentration is 0.190 mol/L, the final concentration is 0.095 mol/L (converted from 95.0 mM), and the final volume is 350 mL. Rearranging the equation, we can find the stock volume:

(stock volume) = (final concentration) x (final volume) / (stock concentration)

Substituting the values, we get:

(stock volume) = (0.095 mol/L) x (0.350 L) / (0.190 mol/L) = 0.175 L = 175 mL