Chem help webassign?

Posted on 2016-05-20 18:44:00 in Chemistry by VIC

If a saturated solution of KNO3 in 100. g of H2O at 60°C is cooled to 20°C, approximately how many grams of the solute will precipitate out of the solution? 

Determine the molarity of each of the following solutions. 
(a) 17.0 g NaOH in enough H2O to make 2.00 L of solution. 

(b) 17.8 g NH4Br in enough H2O to make 150. mL of solution 

(c) 32.4 g H3PO4 in enough H2O to make 500. mL of solution 


Determine the number of grams of solute needed to make solutions of the following volumes and concentrations. 
(a) 1.00 L of a 2.28 M solution of H2SO4 

(b) 2.50 L of a 1.72 M solution of Ba(NO3)2 

Determine the molality of each of the following solutions. 
(a) 346.5 g H2SO4in 1.000 kg H2 

(b) 72.3 g HNO3 in 0.250 kg H2 

(c) 17.1 g NaOH in 300. g H2O 

(c) 500. mL of a 0.184 M solution of KOH

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