Inorganic Chemistry Answers

Acetylene gas burns in oxygen, producing gaseous carbon dioxide

Structure of 1,2 and 1,7-c2B9H11^{-2 clusters}

Calculate the framework electrons using Wade's rule B6H6^-2

Data Table Molarity of Na2S2O3 0.125 M

Initial Buret Reading (Na2S2O3) 1.50 mL

Final Buret Reading (Na2S2O3) 14.35 mL 

Calculate the average molarity of commercial bleach before it was diluted

In equation 4 on the lab information sheet, what element is oxidized? What element is reduced? Justify using oxidation numbers

I3- (aq) + 2S2O32- (aq) → 3I- (aq) + S4O62- (aq)                   Equation 4

What is the amount of gold present in 15.5g of a pure gold wedding ring.(Au=197)

B(OH)3 is acidic while Al(OH)3 is amphoteric in nature

1) Lithium chloride, LiCl.

Theoretical lattice energy in kJmol: -845

Experimental lattice energy in kJmol: -848

2) Magnesium iodide, MgI2.

Theoretical lattice energy in kJmol: -1944

Experimental lattice energy in kJmol: -2327

Comment on the theoretical and experimental lattice energy values, giving reasons for any differences and similarities.

A student has carried out a moving boundary experiment using K₂SO₄ as an electrolyte.

The data obtained was tabulated in the following Table.

Cation velocity 11.43 mms-1

Cross sectional area of tube 28.56 mm²

Transference number of cation 0.593

Anion concentration 0.025 mol dm^-3

Calculate the current flow for the boundary moves as far as 45 mm.

What would be observed when

(i)Chlorine water is added to an aqueous solution of potassium iodide

(ii)Write a balance equation for the reaction taking place in (i) above and account for any differences in your observation in 4e(iii) above

A : Equation

Difference