Chemistry Answers

1. Water is a good solvent

Relate this property to the role of water in plant nutrition:

Answer:

2. Water has a high specific heat.

Relate this property to changing climate and the capacity of bodies of water to

act as temperature buffer:

Answer:

3. The boiling point of water unusually high

Relate this property to questions on small water bodies drying up:

Answer:

4. Solid water is less dense, and in fact floats on liquid water.

Relate this property to the survival of aquatic organisms in temperate countries:

Answer:

What is the equation for the reaction of calcium iodide and nickel?

In each of the following pairs, which is more likely to gain electrons(s)?

balanced the equation of the reaction Fe(s)+O2(g)→Fe2O3(S)

Given, Cd(s) + 2Ht(aq) Cd2"(aq) Hzlg) State the effect on the cell potential, Eceli when the following changes are made: (a) The pressure of hydrogen gas is increased in the cathode compartment: (b) Sodium hydroxide is added into the electrolyte at the cathode: (c) Concentration of Cd?* is decreased. (d) Diameters of electrodes are increased

Plan a multi-step synthesis of carbonyl and non-carbonyl organic molecules in order to produce many organic substances, taking more than one reaction step.

If 28.1 grams of ammonium chloride react to form 8.9 grams of ammonia, how many grams of hydrogen chloride must simultaneously be formed?

GIVEN

(A) PhCHO

(B) CH2(CO2Et)2

(c) PhCOCH3

DESIGN TWO ROUTE FOR THE SYNTHESIS OF PhCOCH2CH(Ph)CH(CO2Et).

(1)EACH OF THE ROUTE SHOULD GO THROUGH THE MICHAEL ADDITION REACTION.

(2) COMMENT ON THE SUITABILITY OF EACH ROUTE.

a solution of gold (3) trioxonitrate (5) is electrolysed using a current of 25mA until 1.2g of gold is deposited at the cathode . what is the amount of electricity that would have passsed through the solution. and how long will it take for such an amount of gold to be deposited. then calculate the volume of the gas liberated at the anode.

11. Describe how you would prepare 465 mL of 0.3550 M

potassium dichromate solution starting with

(b) 0.750 M potassium dichromate solution