Question

Now, you start to prepare a sodium bicarbonate solution and you can only find 1.75M NaHCO, (liquid; mw=84.07) solution in the cabinet to use. Your instructions state you need 500ml of 75mM NaHCO3. 7. Identify the final concentration and final volume of the solution you are making, the initial concentration of the solute source, write out the formula, and then complete the math. How much of this solution and solvent from the cabinet should you use to prepare this solution? 1.5 pt.

Answer 1

SOLUTION - for preparing 500 ml of 75 mm NaHCO3, Given: - 1.75m NaHCO₃(mw. 84.07) since, we know the mitial and final molarity of the lodium bicarbonate eolulion and the final volume of the solution i.e. 500 ml. we apply the below formula, a 1mv, = M2V2] M = Tuitial molarity of the solution - 1.75M. - Initial volume to be taken in ml. M₂ = final molarity of the solution - 75 min U₂ - final volume of the solution = 500 ml . 1.75,4 V, = 45*10-3x soo me V = 75X10-3 x 500 ml 1.75 = 21.428 ml 21.428 ml of the 1.75 M NaHCO3 solution is to be taken from the cabinet to prepare 500ml of. 75 mm Natcoz.