In: Chemistry
How many mL of a 0.160 M aqueous solution of copper(II) bromide, CuBr2, must be taken to obtain 5.86 grams of the salt? __ mL
Molarity = number of moles of solute (1000) / volume of solvent in ml
Given, salt = 5.86 g ; molarity = 0.160 M
number of moles of solute = given mass /molar mass
Molar mass of Cu = 63.546 g and Br = 79.904 g
Molar mass of Copper(II) bromide; 63.546 +2(79.904) = 223.534 g/mol
Number of moles = 5.86g / 223.354 gmol-1
= 0.0262
molarity = 0.0262 (1000) / vol. in ml
0.160 M = 0.0262 (1000) / vol. in ml
vol. in ml = moles (1000) / molarity
vol. in ml = 0.0262 (1000) / 0.160
vol. in ml = 26.2 /0.160
vol. in ml =163.75 ml