SSCE VCE Chemistry Chemical Elements: Give the chemical formula for

Give the chemical formula for i - VCE - SSCE Chemistry - Question 1 - 2004 - Paper 1

Question 1

Give the chemical formula for i. A nitrogen-containing compound that is the end waste product of the digestion of proteins ii. The carboxyl functional group ii... show full transcript

Worked Solution & Example Answer:Give the chemical formula for i - VCE - SSCE Chemistry - Question 1 - 2004 - Paper 1

Step 1

i. A nitrogen-containing compound that is the end waste product of the digestion of proteins

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Answer

The chemical formula for the nitrogen-containing compound that is the final waste product of protein digestion is urea, which is represented by the formula:

$\text{NH}_2\text{CONH}_2$

Step 2

ii. The carboxyl functional group

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Answer

The carboxyl functional group is represented by the formula:

$\text{COOH}$

Step 3

iii. An oxide from period 3 that reacts with NaOH but not with HCl

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Answer

An example of an oxide from period 3 that meets this criterion is:

$\text{SiO}_2$

Silicon dioxide reacts with sodium hydroxide but does not react with hydrochloric acid.

Step 4

iv. A compound that is always a reactant in a hydrolysis reaction

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Answer

Water (

$\text{H}_2\text{O}$

) is a compound that is always a reactant in hydrolysis reactions.

Step 5

v. The element whose ion of charge +3 has an electron configuration of 1s²2s²2p⁶3s²3p³3p⁶

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Answer

The element with an ion of charge +3 that has this electron configuration is Aluminum (Al). Its electron configuration is:

$\text{[Ne]}3s^2 3p^1$

When it forms a +3 ion, it loses its 3s² and 3p¹ electrons.

Give the chemical formula for i - VCE - SSCE Chemistry - Question 1 - 2004 - Paper 1

Worked Solution & Example Answer:Give the chemical formula for i - VCE - SSCE Chemistry - Question 1 - 2004 - Paper 1

i. A nitrogen-containing compound that is the end waste product of the digestion of proteins

ii. The carboxyl functional group

iii. An oxide from period 3 that reacts with NaOH but not with HCl

iv. A compound that is always a reactant in a hydrolysis reaction

v. The element whose ion of charge +3 has an electron configuration of 1s²2s²2p⁶3s²3p³3p⁶

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