Answer to Question #113867 in General Chemistry for Jose ramirez

Question

1. What is the molarity of a solution which contains 5.85 g of NaCl in 100 L of water?
2. Which of the following processes increases the rate at which most ionic solids dissolve in water?
Agitation
Large surface area
decreasing the temperature
Agitation and larger surface area

Answer 1

Solution.

1.

$m(NaCl)=5.85g;$

$V(H_2O)=100L;$

$M(NaCl)=58g/mol;$

$Molarity=\dfrac{mol solute}{L solution};$

$\nu(NaCl)=\dfrac{m(NaCl)}{M(NaCl)};$

$\nu(NaCl)=\dfrac{5.85g}{58g/mol}=0.1mol;$

$Molarity=\dfrac{0.1}{100}=0.0001mol/L;$

2.Agitation and larger surface area;

Answer: 1. $Molarity=0.0001mol/L;$

2.Agitation and larger surface area.