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3 (a) An acid can be reacted with a base in a titration experiment - Edexcel - GCSE Chemistry - Question 3 - 2015 - Paper 1

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3 (a) An acid can be reacted with a base in a titration experiment. (i) State the name of the type of reaction when an acid reacts with a base. (ii) Complete the s... show full transcript

Worked Solution & Example Answer:3 (a) An acid can be reacted with a base in a titration experiment - Edexcel - GCSE Chemistry - Question 3 - 2015 - Paper 1

Step 1

State the name of the type of reaction when an acid reacts with a base.

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Answer

The reaction is known as a neutralisation reaction.

Step 2

Complete the sentence by putting a cross (✕) in the box next to your answer.

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Answer

The correct answer is D acid + base → salt + water.

Step 3

Calculate the mass of solid sodium hydroxide transferred to the flask.

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Answer

To find the mass of solid sodium hydroxide transferred to the flask, subtract the mass of the empty container from the total mass of the container with sodium hydroxide:

extMassofsodiumhydroxide=extMassofcontainer+solidsodiumhydroxideextMassofemptycontainer ext{Mass of sodium hydroxide} = ext{Mass of container + solid sodium hydroxide} - ext{Mass of empty container}

Substituting the given values:

extMassofsodiumhydroxide=17.12extg7.02extg=10.10extg ext{Mass of sodium hydroxide} = 17.12 ext{ g} - 7.02 ext{ g} = 10.10 ext{ g}

Step 4

Calculate the concentration of the sodium hydroxide solution in g dm³.

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Answer

To calculate the concentration of sodium hydroxide solution, divide the mass of sodium hydroxide transferred by the total volume of the solution:

ext{Concentration} = rac{ ext{Mass of sodium hydroxide}}{ ext{Volume of solution (dm³)}}

Substituting the values:

ext{Concentration} = rac{10.10 ext{ g}}{2 ext{ dm}^3} = 5.05 ext{ g dm}^3

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