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Inorganic Chemistry
Why does aluminium fluoride have a high melting and boiling point?
Inorganic Chemistry
Suppose you needed to have 500.0 Kg of gold, use five (5) of the words from the word bank above to explain how you would make sure that you were able to produce the required amount. Note, you should not be doing any calculations, explain what you would need to do.
Inorganic Chemistry
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.
2. A) Calculate the average volume of HCl used in the titration.
B) How many moles of HCl are there in this volume?
C) Write a balanced equation for the reaction between calcium hydroxide and hydrochloric acid solution.
D) Calculate the number of moles of calcium hydroxide that reacted.
2. A) Calculate the average volume of HCl used in the titration.
B) How many moles of HCl are there in this volume?
C) Write a balanced equation for the reaction between calcium hydroxide and hydrochloric acid solution.
D) Calculate the number of moles of calcium hydroxide that reacted.
Inorganic Chemistry
Determine the mass in grams of carbon in a pain tablet that contains 320 mg of aspirin
Inorganic Chemistry
A solution of NaCl is neutral, with an expected PH of 7. If electrolysis was carried out on 500 mL of an NaCl solution with a current of 0.500 A, how many seconds would it take for the PH of the solution to rise to a value of 9? (PH is related to H+ concentration by PH = -log [H+]).
Inorganic Chemistry
if 48 grams of Al and 100 g of Br2 are reacted, how much AlBr3 can be produced
Inorganic Chemistry
1.A piece of zinc was added to 1000cm3 of 0.2M hydrochloric acid. After effervescence had stopped, 28cm3 of the resulting solution required 17cm3 of 0.08M sodium trioxocarbonate IV solution for complete neutralization. Calculate the mass of the zinc added. (Zn = 65, HCl = 36.5, Na2CO3 = 106)
2.2g of a mixture of sodium hydroxide and sodium chloride (as impurity) were dissolved in 500cm3 of water. If 25cm3 of this solution were neutralized by 21cm3 of 0.1mol/dm3 hydrochloric acid, calculate the percentage of the sodium chloride impurity.
(NaOH = 40, HCl = 36.5, NaCl = 58.5)
Inorganic Chemistry
1.Of the following pairs, which is MORE metallic:
a.Si or Ge ………
b.As of Ge ……….
c.Ba or Cs ………..
d.Be or B ………….
e.Kr or Xe ………….
2.Of the following pairs, which is more electropositive
a.Ca or Al …………….
b.K or Mg ……………
c.Si or Li ………………
d.O or Cl ……………….
e.P or Na ……………….
3.The electron configurations of six neutral atoms are shown:
a.1s2 2s2 2p6 3s1
b.1s2
c.1s2 2s2 2p6 3s2
d.1s2 2s2 2p6
e.1s2 2s1
f.1s2 2s2 2p3
a.Which has the highest first ionization energy? ………………
b.Which has the highest non-metallic strength? …………
c.Which is the most electronegative? ………..
d.Which has the highest electron affinity? …….
e.Which atom has the smallest size? ………….
a.Si or Ge ………
b.As of Ge ……….
c.Ba or Cs ………..
d.Be or B ………….
e.Kr or Xe ………….
2.Of the following pairs, which is more electropositive
a.Ca or Al …………….
b.K or Mg ……………
c.Si or Li ………………
d.O or Cl ……………….
e.P or Na ……………….
3.The electron configurations of six neutral atoms are shown:
a.1s2 2s2 2p6 3s1
b.1s2
c.1s2 2s2 2p6 3s2
d.1s2 2s2 2p6
e.1s2 2s1
f.1s2 2s2 2p3
a.Which has the highest first ionization energy? ………………
b.Which has the highest non-metallic strength? …………
c.Which is the most electronegative? ………..
d.Which has the highest electron affinity? …….
e.Which atom has the smallest size? ………….
Inorganic Chemistry
A patient with heat stroke has a temperature of 106.0 F. What does this read on a
Celsius thermometer?
Celsius thermometer?
Inorganic Chemistry
1. 45cm3 of a solution containing 4g of impure potassium hydroxide in 250cm3 was neutralized by 25cm3 of 0.05M hydrochloric acid solution. Calculate
i. The concentration of the pure KOH in moles/dm3
ii. The percentage purity of KOH
iii. The percentage impurity of KOH
iv. The number of moles of hydroxyl ions present in the pure KOH that reacted
i. The concentration of the pure KOH in moles/dm3
ii. The percentage purity of KOH
iii. The percentage impurity of KOH
iv. The number of moles of hydroxyl ions present in the pure KOH that reacted
