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Experiment: Indicating Acids Using pH
Identifying Components of CER
Use the following information to answer the question about Claim,
Evidence, and Reasoning.
Experimental Question:
Is solution A an acid?
Experimental Observations:
Which sentence represent the REASONING in the
CER?
Sentence 3
Two solutions, labeled A and B, are tested using universal indicator
paper and a pH meter. Solution A turns the paper red and shows a
reading of 3 on the pH meter, while solution B turns the paper
green and shows a reading of 7 on the pH meter.
Sentence 1
The sentences in the CER statement below are labeled with
numbers for identification. The following sentences may not be
provided in the proper order
(1) Both universal indicator paper and the pH meter indicated an
acidic nature for solution A, with the paper turning red and the pH
meter showing a reading of 3.
(2) Acids have a pH below 7. The observed color change with the
pH reading suggests solution A is acidic in nature.
(3)Solution A is an acid.
Sentence 2



Answer :

GinnyAnswer
In the given context, the sentence that represents the reasoning in the CER (Claim, Evidence, Reasoning) framework is:

(2) Acids have a pH below 7. The observed color change with the pH reading suggests solution A is acidic in nature.

Here's a breakdown to help you understand why sentence 2 is the reasoning part:

1. Claim (C): The claim is the statement that answers the experimental question. In this case, it is "Solution A is an acid" (mentioned in sentence 3).

2. Evidence (E): The evidence supports the claim with data or observations. Sentence 1 provides the evidence by stating that both the universal indicator paper and the pH meter indicated an acidic nature for solution A, showing a red color change and a pH reading of 3.

3. Reasoning (R): The reasoning connects the evidence to the claim by providing a logical explanation. Sentence 2 serves as the reasoning by stating that acids have a pH below 7, and the observed color change (to red) along with the pH reading of 3 suggests that solution A is acidic.

Therefore, sentence 2 is the reasoning part as it explains why the evidence (red color change and pH reading of 3) supports the claim that solution A is an acid.

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