Please answer them all, and show all work. Explain anything you need to so that
ID: 833023 • Letter: P
Question
Please answer them all, and show all work. Explain anything you need to so that I can learn and be able to do these on my own. Thank You.
Solution Problems
1.) How many grams of sucrose must be added to 375g of water to prepare a 2.75% (w/w) solution of sucrose ?
2.) In the treatment of certain illnesses of the human body a 0.92% (w/v) sodium chloride solution is administered intravenously. How many grams of sodium chloride are required to prepare a 345 mL of this solution ?
3.) Determine the molarities of the following solutions
a.) 2.37 mole of KNO3 dissolved in enough water to give 650. mL of solution
b.) 35.9 g of NaOH dissolved in enough water to give 2.50 L of solution
4.) How many liters of a 0.100 M solution of caffeine, can be prepared from 50.0 g of caffeine ?
5.) what volume in liters of a 3.40 M KOH solution is needed to react completely with 0.100L of a 6.72 M H2SO4 solution to give potassium sulfate and water ?
6,) how many grams of BaCrO4 can be produced from the reaction of 1.05 L of 0.470 M BaCl2 solution with an excess of 2.00 M potassium chromate solution.?
7.)What volume in liter of H2 gas measured at STP can be produced from 0.575 L of 1.22 M HBr solution and an excess of Zn ?
8.) A solution is made by diluting 225 mL of a 0.245 M aluminum nitrate solution with water to a final volume of 0.750 L , calculate :
a.) The molarities of Al3+ and nitrate ions in the original solution
b.) The molarities of Al(NO3)3 , Al3+ , and NO3- in the diluted solution.
9.) And Aqueous solution having a density of 0.980 g/mL is prepared by dissolving 11.3 mL of CH3OH (density 0.793 g/mL) ub ebiygh water to produce 75.0 mL of solution. Express the percent CH3OH in the solution as
a.) % (w/v)
b.) %(w/w)
c.) % (v/v)
10.) What is the molarity of a 1.75 L Ca(OH)2 solution that would completely react with 2.00 L of CO2 g measured at STP according to the following reaction ?
CO2(g) + Ca(OH)2 (aq) >>> CaCO3 (s) + H2O (l)
?
11.) A 10.00 mL portion of a 5.000 M NaC2H3O2 solution is transferred to a 500.00 mL volumetric flask and enough water is added to bring the solution up to the mark. What is the concentration of the new solution ? ( dilution problem)
12.) If 25.00 mL of a 0.92% (w/v) NaCl solution is placed in a 100.00 mL volumetric flask and water is added to the mark, what will be the concentration of the new solution ? (dilution problem)
Explanation / Answer
100g of solution