8.2 - Neutralisation Flashcards
(11 cards)
What is neutralisation?
Neutralisation is when you make a substance’s pH level 7, making it neither alkali nor acid by mixing acid with alkali, resulting in salt and water.
Neutralisation involves the cancellation of acids and alkalis.
What happens if too much acid is added to an alkali during neutralisation?
It becomes an acidic liquid.
This highlights the importance of precise measurement in neutralisation reactions.
What happens if too little acid is added to an alkali during neutralisation?
It becomes an alkali liquid.
This further emphasizes the need for careful addition of reactants.
Why is a burette used in the neutralisation process?
To add acids/alkalis in small amounts to observe the colour change.
This allows for more accurate control over the reaction.
What is formed when hydrochloric acid neutralises sodium hydroxide?
Sodium chloride (salt) and water.
This reaction illustrates the concept of neutralisation in a chemical context.
What is one example of neutralisation in everyday life?
Indigestion treatment/ Growing crops/Neutralising lakes/ Toothpaste
Medicines neutralise stomach acid to relieve discomfort.
How does toothpaste function as a neutraliser?
It acts as an alkali to balance out acids produced by bacteria in the mouth.
This helps protect teeth from acid damage.
What is a method used to neutralise lakes affected by acid rain?
Dropping alkalis into the lake.
This is necessary for the survival of aquatic plants and animals.
Why do farmers sometimes spray alkali on acidic soil?
To neutralise the soil for better crop growth.
This practice helps create a more suitable environment for crops.
Fill in the blank: Neutralisation typically results in the production of _______ and water.
salt
Salt is a common product of neutralisation reactions.
True or False: Neutralisation can only occur between strong acids and strong alkalis.
False
Neutralisation can occur between weak acids and weak alkalis as well.
