9.3 Neutralization Flashcards
What’s neutralization
Chemical reaction made when acids and alkali are mixed tgt
What are the substances which take part in a chemical reaction called
Reactants
What are the substances formed as a result of the chemical reaction called
Products
What is left when we evaporate the neutralised solution to dryness
white solid, it is a salt
Experiment for testing substances formed during neutralisation
Neutralised solution in watch glass, beaker w water, Bunsen burner
slide above, evaporate, dry cobalt chloride paper
What is released in neutralization, how do we know this
What is produced
Heat, rise in temp of mixture
Salt and water
Neutralization word equation
Acid + alkali —> salt + water
What’s conserved in neutralisation
Mass
5 applications of neutralisation
Prevent tooth decay
Relieve stomach upset
Treat insect stings/bites
Treatment of industrial waste containing acids/alkali
Regulation of pH value in soil
How does neutralisation prevent tooth decay
Bacteria -> sugar to acid, toothpaste slightly alkaline
Sugar free gum stimulate production of saliva, slightly alkaline
How does neutralisation relieve stomach upset
hydrochloric acid digest, burning sensation
Antacids , excess acid
How does neutralisation treat insects stings/bites
May contain acids/alkalis
Apply acidic/alkaline substances
How does neutralisation treat industrial wastes that has acid/alkaline
Pollution, discharged w/o proper treatment
Use alkalis, acidic wastes
Use acids, alkaline wastes
Reduce pollution
How does neutralisation regulate ph value of soil
Don’t grow well in soil too acidic/alkaline
Too acidic: slaked lime
Too alkaline: sulphur—> sulphuric acid
