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Can. Accepted. But I realised u tend to write long sentences joining with 'as', 'and', 'because'. Try use full stop and continue in second sentence. Cause u may then to keep writing and sometime may end up giving contradictory statements if u accidentally join wrongly.

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And for this question can I get the second mark ?

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Yes can. They bring similar meaning.

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Ohh I think it’s cuz the Ag is a solid so it shouldn’t be included in the calculation

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And this question i am not 100 percent sure but i think its because the free radical chlorine can substitute into 3 different positions on pentane to form 3 different products ( think of it as isomers )

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Ms Ellen, can partially soluble be accepted in this case?

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Ms Ellen for these 2 questions is it ok if I used the term valence electron instead if outer electron which Is removed

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No no no Yuga. Forward reaction is endothermic, so if temperature increases, the eq will shift toward heat absorbing reaction, which is forward in this reaction.

Your answer also did not state the EFFECT OF PERCENTAGE of HBr??

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1-bromobutane can undergo elimination to form butene and can undergo hydrolysis to form butanol and can be formed from a free radical substitution reaction of butane with Br2 but also can be involved in its own further free radical substitution ( until all of its Hydrogen atoms are replaced )

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When water is added to chlorides of period 3 we know that Aluminium, Silicon and Phosphorus chloride all undergoes hydrolysis, and react with water. Aluminium reacts with water to form HCl as from H+ + Cl-.  But PCl3 and SiCL4 also reacts with water to form HCL as products

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Element D across period 3 with smallest atomic radius must be Cl because atomic radius decreases across the period and the last element in period 3 excluding argon which is inert, is Cl. Element E with the third lowest melting point must be P because out of the elements in period 3, Na to Si have high melting point so from P to Cl the melting point order from highest to lowest is S>P>Cl>Ar due to the natural occurance of the element as molecules

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The polymer contains a ester group COO so it would react with both sulfuric acid and sodium hydroxide as we learn it as hydrolysis reactions in our learning outcome. It does not react with Sodium because there is no OH group from hydroxy for a displacement reaction or carboxylic acid group which reacts with metal as a weak acid

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Ms Ellen why is this answer wrong. Equilibrium shift to left when temperature increase right?

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Priority given to those with functional groups. Because alkane is considered saturated Hydrocarbons, and if alcohol is present, then the suffix should focus on the alcohol naming.

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Ms Ellen, for (a)(ii) is 2-hydroxybutane accepted instead of butan-2-ol? 😂😂

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For this particular question, you still need to focus back on the mentioning the oxidation number of Cl, ie always -1

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Ms Ellen, for the last point, can I say chlorine always has 7 outer shell electrons?

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Gavin, can be accepted as the first point, ie cation size increases. But your second statement though fulfil MS criteria of saying attraction to sea of electrons decreases, your addition to "due to increasing shielding effect" will lead to wrong concept, as the decreasing attraction is due to increasing cation size, NOT increasing shielding effect. Hence, M2 is penalised.

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Ms ellen can I get marks if I say the number of shells increases? although the mark scheme says below?