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How much 0.2mol/dm³ hydrochloric acid solution could make from 100cm³ of 1.0mol/dm³ hydrochloric acid? A 20 cm³? B 200cm³? C 500cm³? D 600cm³? Your answer - OCR Gateway - GCSE Chemistry - Question 11 - 2018 - Paper 1

Question 11

How much 0.2mol/dm³ hydrochloric acid solution could make from 100cm³ of 1.0mol/dm³ hydrochloric acid? A 20 cm³? B 200cm³? C 500cm³? D 600cm³? Your answer

Worked Solution & Example Answer:How much 0.2mol/dm³ hydrochloric acid solution could make from 100cm³ of 1.0mol/dm³ hydrochloric acid? A 20 cm³? B 200cm³? C 500cm³? D 600cm³? Your answer - OCR Gateway - GCSE Chemistry - Question 11 - 2018 - Paper 1

Step 1

Calculate the number of moles in the 100 cm³ of 1.0 mol/dm³ hydrochloric acid

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Answer

To find the number of moles (n) in the hydrochloric acid solution, use the formula:

$n = C imes V$

Where:

$C$ is the concentration in mol/dm³
$V$ is the volume in dm³

First, convert the volume from cm³ to dm³:

$100 ext{ cm}^3 = 0.1 ext{ dm}^3$

Now, calculate:

$n = 1.0 ext{ mol/dm}^3 imes 0.1 ext{ dm}^3 = 0.1 ext{ moles}$

Step 2

Determine the volume of 0.2 mol/dm³ solution that can be made

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Answer

Next, we need to find out how much volume (V) of 0.2 mol/dm³ solution can be produced with 0.1 moles of hydrochloric acid. Rearranging the formula:

$V = \frac{n}{C}$

Substituting the values:

$V = \frac{0.1 ext{ moles}}{0.2 ext{ mol/dm}^3} = 0.5 ext{ dm}^3$

Convert the volume from dm³ to cm³:

$0.5 ext{ dm}^3 = 500 ext{ cm}^3$

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Questions answered

How much 0.2mol/dm³ hydrochloric acid solution could make from 100cm³ of 1.0mol/dm³ hydrochloric acid? A 20 cm³? B 200cm³? C 500cm³? D 600cm³? Your answer - OCR Gateway - GCSE Chemistry - Question 11 - 2018 - Paper 1

Worked Solution & Example Answer:How much 0.2mol/dm³ hydrochloric acid solution could make from 100cm³ of 1.0mol/dm³ hydrochloric acid? A 20 cm³? B 200cm³? C 500cm³? D 600cm³? Your answer - OCR Gateway - GCSE Chemistry - Question 11 - 2018 - Paper 1

Calculate the number of moles in the 100 cm³ of 1.0 mol/dm³ hydrochloric acid

Determine the volume of 0.2 mol/dm³ solution that can be made

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