in a group assignment, students are required to fill 10 beakers with 0.720 m cacl2. if the molar mass of…

in a group assignment, students are required to fill 10 beakers with 0.720 m cacl2. if the molar mass of cacl2 is 110.98 g/mol and each beaker must have 250. ml of solution, what mass of cacl2 would be used? use molarity = moles of solute / liters of solution. 3.13 g 38.5 g 200 g 617 g

in a group assignment, students are required to fill 10 beakers with 0.720 m cacl2. if the molar mass of cacl2 is 110.98 g/mol and each beaker must have 250. ml of solution, what mass of cacl2 would be used? use molarity = moles of solute / liters of solution. 3.13 g 38.5 g 200 g 617 g

Answer

Answer:

38.5 g

Explanation:

Step1: Calculate total volume

First, find total volume of solution. Each beaker is 250 mL and there are 10 beakers. So $V = 250\ mL\times10=2500\ mL = 2.5\ L$.

Step2: Calculate moles of $CaCl_2$

Use the molarity formula $M=\frac{n}{V}$, where $M = 0.720\ M$ and $V = 2.5\ L$. Rearranging for $n$ (moles), we get $n = M\times V=0.720\ mol/L\times2.5\ L = 1.8\ mol$.

Step3: Calculate mass of $CaCl_2$

Use the formula $m = n\times M_m$, where $n = 1.8\ mol$ and molar - mass $M_m=110.98\ g/mol$. So $m = 1.8\ mol\times110.98\ g/mol\approx38.5\ g$.