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Find a pattern or rule in the neutralisation of an alkali.
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Neutralisation Astrid Christie In this investigation, I plan to find a pattern or rule in the neutralisation of an alkali. I plan to use hydrochloric acid and sodium hydroxide. I will use the indicator, phenolphthalein, to tell when the sodium hydroxide has been neutralised, which will turn from purple to clear. The Background of the Reaction The reaction is neutralisation. Neutralisation is where an acid and alkali are mixed to neutralise the substance to pH7. Acids and alkalis are chemical opposites - when they react together, they "cancel each other out". The reaction equation: Hydrochloric acid + Sodium hydroxide = Water + Salt HCl + NaOH = H20 + NaCl Ion Reaction The sodium hydroxide gives an OH- ion and the hydrochloric acid gives an H+ ion. When mixed together, they cancel each other out and the substance is neutralized to make H20. After this has happened, the sodium and the chlorine (that is left over from the sodium...
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