Other Chemistry Answers

Balance the following redox reaction in basic media:

CN-

(aq) + MnO4

-

(aq) → CNO-

(aq) + MnO2

25.00 mL aliquot of 0.016 M NaCl was titrated with 27.52 mL of 0.18 M

AgNO3. Determine whether a precipitate will form at end point. Ksp AgCl = 1.6

x10-10

Calculate the pH of 0.12 M NH3 solution. Kb NH3 = 1.8 x10-5 

The solubility of Al(OH)3 is 5.15 x 10-7 g/ℓ. Calculate the Ksp of Al(OH)3.

Calculate the mass of 0.000423 mol sodium borate, Na2B4O7.10H2O and express

the answer in milligrams. 

Determine the volume of ethanol, CH3CH2OH, that is in 70 mL of 42%(v/v) red

wine. 

A solution contains 12.6 ppm of dissolved Ca(NO3)2. Calculate the concentration 

of NO3



in moles per litre. (4)

Calculate the mass of potassium hydroxide, KOH, required to prepare a 200 mL

solution that was diluted to give a concentration of 0.030 mol/L. The solution has

a dilution factor of 5.

A solution of Ba(OH)2 was standardized against 0.1016 g of primary standard 

benzoic acid C6H5COOH. Calculate the concentration of Ba(OH)2 if the end point 

was 20.89 mL. 

A piece of titanium metal with a mass of 20.8 g is

heated in boiling water to 99.5°C and then dropped

into a coffee cup calorimeter containing 75.0 g of

water at 21.7°C. When thermal equilibrium is reached,

the final temperature is 24.3°C. Calculate the specific

heat capacity of titanium.