type the correct answer in the box. a lab technician needs to create 570.0 milliliters of a 2.00 m solution…

type the correct answer in the box. a lab technician needs to create 570.0 milliliters of a 2.00 m solution of magnesium chloride (mgcl₂). to make this solution, how many grams of magnesium chloride does the technician need? refer to the periodic table for help. express your answer to three significant figures. the required mass is grams.

type the correct answer in the box. a lab technician needs to create 570.0 milliliters of a 2.00 m solution of magnesium chloride (mgcl₂). to make this solution, how many grams of magnesium chloride does the technician need? refer to the periodic table for help. express your answer to three significant figures. the required mass is grams.

Answer

Explanation:

Step1: Calculate moles of MgCl₂

Use the formula $n = M\times V$, where $M$ is molarity and $V$ is volume in liters. First convert volume to liters: $V = 570.0\ mL=0.5700\ L$, $M = 2.00\ M$. So $n = 2.00\ mol/L\times0.5700\ L = 1.14\ mol$.

Step2: Calculate molar mass of MgCl₂

From the periodic table, molar mass of $Mg = 24.31\ g/mol$, molar mass of $Cl= 35.45\ g/mol$. Molar mass of $MgCl₂=24.31\ g/mol + 2\times35.45\ g/mol=24.31\ g/mol + 70.90\ g/mol = 95.21\ g/mol$.

Step3: Calculate mass of MgCl₂

Use the formula $m=n\times M_m$, where $n$ is number of moles and $M_m$ is molar mass. So $m = 1.14\ mol\times95.21\ g/mol\approx109\ g$.

Answer:

109