Thursday, 20 April 2017

Hi again!!

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Hi all, It's been so long! Long story short, sorta locked myself out of this account and thus...well...haven't been able to post h...
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Wednesday, 18 May 2016

2.38 describe tests for the anions...

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Halide ions To test for halide ions, add dilute nitric acid (HNO3) followed by silver nitrate solution (AgNO3). A precipitate will be prod...

1.55 write ionic half equations representing the reactions at the electrodes during electrolysis

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Half equations just show what happened at each electrode. Like any equation, they need to be balanced. here are some examples... 2Br- > ...
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1.46 understand that a metal can be described as a giant structuree of positive ions surrounded by a sea of delocalised electrons

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In a metal, the atoms are ionically bonded in a giant 3-D structure. The outer shell electrons become detached (making positive ions, cation...

1.31 deduce the charge of an ion from the electronic configuration of the atom from which the ion is formed

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An atom with less then four electrons on its outer shell will want to lose electrons because that is the quickest way for it to have a full...
Tuesday, 17 May 2016

5.22 understand that nitrogen from air, and ydrogen from natural gas or the cracking of hydrocarbons, are used in the manufacture of ammonia

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Ammonia is manufactured using hydrogen and nitrogen (as ammonia is  NH 3 ). The equation for the reaction is... N 2 (g)   + 3 H 2 (g)  ⇌  ...
Sunday, 15 May 2016

5.21 understamd that condensation polymerisation produces a small molecule, such as water, as well as the polymer

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When condensation polymerisation occurs, a small molecule (such as water) is produces, as well as the monomer.
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