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Why does distilled water need very little soap to give lather
2.83g of a sample of haematite iron ore [iron (III) oxide,Fe2O3] were dissolved in
of iron(II) ions.This solution of iron(II) ions required26.4cm3
concentrated hydrochloric acid and the solution diluted to250cm3
was reduced with tin(II) chloride (which is oxidised to Sn4+in the process) to form a solution
potassium
of a0.0200mol/dm3
.25.0cm3of this solution
dichromate(VI) solution for complete oxidation back to iron(III) ions.
Why are alkali metal chlorides more soluble than alkaline earth chlorides? Explain.
Calculate the pH of each of the following:
1. [OH-] = 3.0 x 10-9
2. 0.024 M HCI
3. 0.022 M NaOH
4. pOH = 3.2
(a) Write the electronic configuration of the elements platinum and gold. Also give
reasons in support of your answer.
(a) Write the electronic configuration of the elements platinum and gold. Also give
reasons in support of your answer.
Answer the following questions based on YOUR OWN UNDERSTANDING. Please do not copy paste:(
1. The greater the molar heat of vaporization of a liquid, the greater its vapor pressure. Is this true or not? Explain why or why not.
2. As a liquid is heated at constant pressure, its temperature rises. This trend continues until the boiling point of the liquid is reached. No further rise in the temperature of the liquid can be induced by heating. Explain.
3. Why is molar heat of fusion lower than molar heat of vaporization?
Classify the crystalline forms of these substances as ionic crystals, covalent crystals, molecular crystals, or metallic crystals.
1. CO2
2. B
3. S8
4. KBr
5. Mg
6. SiO2
7. LiCl
8. Cr
9. Sr
10. MgCl2
naphthalene is pair of the molecule are isomeric or not and give a reason.
Discuss Implications if the two stereoisomers are not separated, with reference to ibuprofen and thalidomide
#333702 on Dec 2022