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2 years ago

1.7474×10³ to the third significant figure

Chemistry

1 answer:

kobusy [5.1K]2 years ago

4 0

The third significant figure in the given question is 4.

<h3>What exactly are significant figures?</h3>

The number of digits in a value, often a standard measure, that make a contribution to the precision of the value is referred to as significant figures. The first non-zero digit is used to begin counting significant figures.

All zeros to the right and left of a decimal point are never significant. For example, the number 0.00328 had three significant digits.

It is critical to estimate ambiguity in the final result, which is where significant figures come into play.

Thus, the third significant figure in the given equation is 4.

For more details regarding significant figures, visit:

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3 years ago

Suppose 10.0 mL of 2.00 MNaOH is added to (a) 0.780 L of pure water and (b) 0.780 L of a buffer solution that is 0.682 Min butan

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Answer:

a) pH will be 12.398

b) pH will be 4.82.

Explanation:

a) The moles of NaOH added = molarity X volume (L) = 2 X 0.01 = 0.02 moles

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The new concentration of /NaOH will be:

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b) The buffer has butanoic acid and butanoate ion.

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$pH=pKa+log\frac{[salt]}{[acid]}$

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ii) on addition of base the pH will increase.

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4 years ago