Acids Flashcards
What is the taste of an acid
Acids can taste sharp and sour,bitter
Examples of household acids and laboratory acids
Hydrochloric acid Nitric acid Sulfuric acid Vinegar acid Fruit juice
Why are acids more dangerous than others?
Acids are more dangerous when concentrated than diluted
Safety Symbols (hazards)
Corrosive,toxic,flammable,harmful,irritant
Common alkalis
Milk of Magnesia, toothpaste,oven cleaner ,sodium hydroxide and potassium hydroxide
What is an Indicators
Indicators are chemicals with change the colour of acids and alkalis
Names and colour changes of some indicators
RED Litmus Paper :Acid=Red Neutral=Red Alkali=Blue
BLUE litmus Paper:Acid=Red Neutral=Blue Alkali=Blue
Methyl Orange :Acid=Red Neutral=Yellow Alkali =Yellow
Penolpothalien:Acid=Colourless Neutral=Colourless Alkali=pink
What is a neutral substance
A neutral substance is something that is natural has the PH of 7 Examples:Blood,water ,Salt and Water sugar and water…
What does the Ph scale measure
Measure how acidic or Alkaline substance is
TWO ways of measuring the Ph scale
Can be measured using a pH probe or universal indicator
The Ph numbers
0-2 strong acids 3-6 weak acids 7=neutral 8-11=weak Alkali 12-14=strong Alkali
Neutralisation
Acid + alkali –> salt + water
Examples of Neutralalisation
- Stomatch acid+milk of Magnesia
- Acidic sting + toothpaste
- Alkaline sting + lemon juice
How will the ph will change if an acid or alkali is diluted
Water-increases-acid
Water-deacreases-alkali
What do Alkali’s feel like
Feel soapy
