Inorganic Chemistry Answers

what are the electropositive atoms in complex disodium edetate reaction with Mg

What is the trend in ionic radius from potassium to sodium

A CAPE Chemistry student sought to determine the solubility product, Ksp of calcium hydroxide by titrating saturated solution of Ca(OH)2 against standardized hydrochloric acid solution, HCl. The saturated Ca(OH)2 solution was filtered, to remove excess solute, and 25mL aliquots were titrated against 0.10M HCl solution using bromothymol blue indicator.

State the colour change the student observed as the end-point was reached. 

Calculate the concentration of Calcium Hydroxide.

Write the Ksp expression for Ca(OH)2.

Use the equilibrium expression for the dissolution of Ca(OH)2 to determine the concentration of Ca2+ and OH–.

Calculate the Ksp for calcium hydroxide (state the units).

The value the student calculated deviated significantly from the accepted value. The reason given was 

‘some of the excess solute got into the filtrate during filtration of the saturated calcium hydroxide’.

State how this could have affected the Ksp value.

State one other factor that could have affected the Ksp value.

9. Shore has developed systematic procedures for making boron hydrides in good yield taking advantage of ;

A. Pyrolysis of diborane. B. Acidity of -H.

C. Hydrogen abstraction. D. Abstraction of H- .

E. Thermal decomposition.

Calculate the concentration of OH^- in a 0.15 M solution of NH₃. K_b = 1.8 × 10^-5

2.50.00 mL of concentrated nitric acid (16M

HN03) is diluted to 1.000 L. What is the

concentration of the new solution?

A CAPE Chemistry student sought to determine the solubility product, Ksp of calcium hydroxide by titrating saturated solution of Ca(OH)2 against standardized hydrochloric acid solution, HCl. The saturated Ca(OH)2 solution was filtered, to remove excess solute, and 25mL aliquots were titrated against 0.10M HCl solution using bromothymol blue indicator. 

Ca(OH)2(s)   ↔   Ca2+(aq)   +   2OH-(aq) 

A)Calculate the concentration of Calcium Hydroxide.

B)Use the equilibrium expression for the dissolution of Ca(OH)2 to determine the concentration of Ca2+ and OH–.

Explain in detail the Crystal Field Theory. Using

examples where applicable, how does the theory

explain the following for a transition metal complex;

1.The structure.

2.Colours behavior

3.Compound formation

4.Magnetic properties

Prepare and submit a one-page rep

What are lactams? Write the structures of gama -butyrolactam and delta -valerobacteria and give their IUPAC names.

b)  Answer the following stoichiometry questions by referring to the equation below:

2

KClO₃               2 KCl + 3 O₂

i.        If 1.50 moles of KClO₃ decomposes, what is the mass of O₂ that will be produced?

ii.       If 80.0 grams of O₂ was produced, how many moles of KClO₃ are decomposed?

iii.    Find the mass of KClO₃ needed if we need to produce 2.75 moles of KCl.