chemistry final
What is the molality of an unknown HCl solution if it takes 100. ml of a 0.020 M base solution to titrate 55.0 ml of the acid solution?
.0364
What is the pH of a .006 M sodium hydroxide solution?
11.78
A water solution containing an unknown quantity of a nonelectrolyte solute is found to have a freezing point of -0.13 C. What is the molal concentration of the solution? Kf=-1.86C/m
.0699
A 4.0 gram sample of glass was heated from 274 K to 325 K. It absorbed 45 J of heat energy. What is the specific heat of this glass?
.2206
A chemical reaction produced 88.0 ml of sulfur dioxide at STP. What was the mass in grams
.251 g
You have .85 L of a .40M HCl solution. How many moles of HCl does this solution contain?
.34
What is the boiling pint elevation of a solution made form 25.0 grams of a nonelectrolyte solute and 450.0 grmas of water? The molar mass of the solute is 62.0 g/mole. Kbp=0.51C/m
.453 or 100.0718 don't know answer
A solution was prepared by dissolving 25.1 grams of sucrose in 125 grams of water. Find the molal concentration of this solution.
.587
Determine the hydroium ion concentration of an aqueous solution that has a pH of 5.0
1*10^-5
What is the solubilityh in water of silver chloride if ksp=1.8*10^-5
1.34*10^-5
Acetic acid + water produces hydronium ions and acetate ions. Show the balanced reaction. If the initial concentration of the acetic acid is .25 M and the acid dissociation constant is 1.8*10^-5, what is the pH of this solution?
2.7
a sample of oxygen gas has a volume of 250. ml when its presure is 0.847 atm. what will the volume of the gas be at a pressure of 0.987 atm. if the temperature remains constant?
214.5
What is the pH of a .0005 M solution of nitric acid?
3.30
If 999 kj of energy are added to 6.5L of water at 291K, what will the final temperature of the water be? Cwater=4.18J/g K
328 K
A helium filled balloon has a volume of 45.0 L at 25 C and 1.18 atm. What volume will it have at 0.855 atm. and 10 C
58.98
What is the volume in liters of .350 moles of oxygen has at 20.0 C and .0974 atm. pressure?
8.644
Given that H=176kj/mole and S=285J/mole K at 298 K. What is the change in Gibb's free energy?
91.1
The pH of a solution is 8.52 a) what is the hydronium ion conentration? b) what is the hydroxide ion concentration?
a) 3.02*10^-9 b) 3.31*10^-6
