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Novosadov [1.4K]
2 years ago
13

Which pH value would a very acidic solution have? a. 0 b. 6 c. 9 d. 14

Chemistry
2 answers:
Artist 52 [7]2 years ago
6 0
The answer is A. 0 because 9 and 14 would be a pH of basic solutions because they are greater than 7; 0 and 6 are acidic because they are less than 7 but zero is smaller than 6 so it is the most acidic
saul85 [17]2 years ago
6 0
The answer is 0. The pH scale ranges from 0 to 14. 0-6 being very acidic. 7 being neutral and 8-14 being very basic.
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Based on Beer-Lambert's Law,

A = εcl ------(1)

where A = absorbance

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Step 1: Calculate the concentration of the diluted Fe3+ standard

Use:

V1M1 = V2M2

M2 = V1M1/V2 = 10 ml*6.35*10⁻⁴M/55 ml = 1.154*10⁻⁴ M

Step 2 : Calculate the concentration of the sample solution

Based on equation (1) we have:

A(Fe3+) = ε(1.154*10⁻⁴)(1)

A(sample) = ε(C)(4.4)

It is given that the absorbances match under the given path length conditions, i.e.

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C = 0.262*10⁻⁴ M

This is the concentration of Fe3+ in 100 ml of well water sample

Step 3: Calculate the concentration of Fe3+ in the original sample

Use V1M1 = V2M2

M1 = V2M2/V1 = 100 ml * 0.262*10⁻⁴ M/35 ml = 7.49*10⁻⁵M

Ans: Concentration of F3+ in the well water sample is 7.49*10⁻⁵M


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