Investigation of Energy changes in reaction between NaOH and HCL.

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Chemistry Coursework

Investigation of Energy changes in reaction between NaOH and HCL.

Aim

My aim is to find out the heat given out during the neutralisation of HCL and NaOH. HCL will be a constant and NaOH will be varied and mixed with H2O.

Background Knowledge

Neutralisation is when an acid reacts with an alkali to form a salt and water.

Eg.

HYDROCHLORIC ACID + SODIUM HYDROXIDE SODIUM CHLORIDE+WATER

HCL (aq) + NaOH (aq) NaCl (aq) + H2O (l)

ACID + ALKALI SALT + WATER

In the above equation the acid HCL is being reacted with the alkali NaOH and a salt NaCl and water is produced.

Properties Of Acids & Alkalis

Acids

Alkalis

Acids corrode active metals.

Alkalis corrode protein.

Acids turn blue litmus into red.

Alkalis turn red litmus paper into blue.

Acids taste sour.
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Alkalis taste biter.

Acids release a hydrogen ion into aqueous solution.

Alkalis release a hydroxide ion into aqueous solution.

==An exothermic reaction is a reaction that gives out heat; the reactants have more energy than the products, the opposite of exothermic is endothermic, this reaction absorbs heat.

==A strong Acid is one where there are many completely ionised hydrogen ions available in the solution.

==A weak Acid is one where there are few completely ionised hydrogen ions available in the solution.

==A strong Alkali is one where there are many ...

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