Other Chemistry Answers

Calculate the entropy change, So for the following process.

a. Melting of ice at 0°C (heat of fusion of ice is 6.02 kJ/mol)

Are ionization energy and electron affinity the same phenomenon

50.0 ml of 2.50M Sulfuric acid reacted with 43.5ml 2.75 Aluminum hydroxide. The reaction yielded Aluminum sulfate and water. (Al=27g/mol, S=32g/mol, H=1g/mol, O=16g/mol)

1. Write the balance chemical equation.

2. What is the limiting reactant?

3. How much reactant is in excess?

4. How many grams of Aluminum sulfate will be produced?

Calculate the  ΔG° using Hess Law for the reaction: Cu2S(S) + O2(g) ( Cu(s) SO2(g)

2 Cu(s) + S(s)  ( Cu2S(L) Δ    Go  = -86.2 kJ

S(s)  +  O2(g)  (  SO2(g) Δ        Go = -300.1 kJ

NiCl3 is a strong electrolyte.

Determine the concentration of each of the individual ions in a 0.550 M NiCl3

0.550 M NiCl3 solution.

Calculate the chloride ion (Cl−)

(Cl−) concentration for a 0.183 M AlCl3

0.183 M AlCl3 solution.

A student needs to prepare 50.0 mL

50.0 mL of a 0.90 M

0.90 M aqueous H2O2 solution. Calculate the volume of 4.6 M H2O2

stock solution that should be used to prepare the solution.

If 7.72 g

7.72 g of 

CuNO3 is dissolved in water to make a 0.800 M

0.800 M solution, what is the volume of the solution in milliliters?

How many moles of NaOH

NaOH are present in 26.0 mL

26.0 mL of 0.210 M NaOH

What is the function of starch in an iodometric titration? Why should starch solution be added just before the end-point of the titration?