How could the reliability of the analysis of the pond water be improved?
(A) Analyse more samples from the same pond
(B) Use 50 mL of distilled water as a control sample
(C) Analyse samples from different ponds on the site
(D) Remove other contaminants from the sample before the analysis - HSC - SSCE Chemistry - Question 18 - 2015 - Paper 1
Question 18
How could the reliability of the analysis of the pond water be improved?
(A) Analyse more samples from the same pond
(B) Use 50 mL of distilled water as a control ... show full transcript
Worked Solution & Example Answer:How could the reliability of the analysis of the pond water be improved?
(A) Analyse more samples from the same pond
(B) Use 50 mL of distilled water as a control sample
(C) Analyse samples from different ponds on the site
(D) Remove other contaminants from the sample before the analysis - HSC - SSCE Chemistry - Question 18 - 2015 - Paper 1
Step 1
Analyse more samples from the same pond
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Answer
Collecting more samples from the same pond can help to ensure that the data reflects the typical conditions of that pond. This increases reliability by minimizing variability caused by sampling different environments.
Step 2
Use 50 mL of distilled water as a control sample
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Answer
Using distilled water as a control sample can help establish a baseline for comparison, ensuring that results are not influenced by external contaminants present in the pond water.
Step 3
Analyse samples from different ponds on the site
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Answer
This approach can provide a broader understanding of the water quality across various environments, thereby improving reliability by allowing the analysis to account for variability among different ponds.
Step 4
Remove other contaminants from the sample before the analysis
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Answer
By removing other contaminants prior to analysis, the accuracy of the results is enhanced because the data will more accurately reflect the specific components of the pond water, free from external influences.
