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1. How many grams of NaNO3 would you add to 500 g of H2O in order to prepare a solution that is 0.500 molal in NaNO3
2. Calculate the freezing point of a solution containing 1.25 g of benzene in 100 g of chloroform.
3. A solution containing 0.750 g of an unknown substance in 30.0 g of cyclohexane was found to freeze at 3.1 C. What is the molar mss of the unlown substance?
4. Describe an experiment to determine the molal freezing point depression constant (Kf) for a solvent of your choice.
a solution is prepared by dissolving 20.0 g of NaI in enoug water tomake 300.mL of solution How many moles of ions are in 25.mL of thesolution?
A sample of carbon dioxide gas occupies 617 mL at 0.812 atm and 11?C. What will the pressure be at a volume of 717 mL and a temperature of 16?C?Answer in units of atm
Write the net ionic reaction from the following balanced reactions: 1. FeCl3 (aq) + K3PO4 (aq) = FePO4 (s) + 3 KCI (aq) 2. Ba(NO3)2 (aq) + Ag2SO4 (aq) = 2 AgNO3(aq) + BaSO4 (s)
if ammonia is obtained in 90% yield based on hydrogen, how many tons of hydrogen are necessary to produce 100 Mg of ammonia?
During the chlorination of drinking water and wastewater, what is it that makes chlorine an effective microbiocide?
A compound is known to have a free amino group with a pKa of 8.8, and one other ionizable group with a pKa between 5 and 7. To 100 mL of a 0.2 M solution of this compound at pH 8.2 was added 40 mL of a solution of 0.2 M hydrochloric acid.
write equations that show a plausible reaction mechanism for the acid-catalyzed isomerization of maleic acid
What would happen if you increase the pH of this acidic solution by addition of a strong base such as KOH? b.) Write the balanced equation for the reaction (a.) and identify both the stronger acid and base and the weaker acid and base.
Determine the number of bonding electrons and the number non-bonding electrons
One pound of Sulfur combines with one pound of oxygen to produce a gas. What is the percent by weight composition of this gas?
Given the unbalanced equation: Ag2CO3 ® Ag + O2 + CO2, how many moles of Ag can be produced from 2.5 moles of Ag2CO3.
The total molarity of acid and conjugate base in this buffer is 0.100 M . A student adds 6.10 mL of a 0.380 M solution to the beaker. How much will the pH change?
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