acid/bases 1
Give 3 examples of acids found in every day life.
Orange juice, lemon, vinegar, coca cola, tomatoes
what does 0-7 represent on the pH scale?
acids
A substance that can be dissolved in water
soluble
A substance that cannot be dissolved in water
Insoluble
Give 3 examples of bases found in everyday life
Drain cleaner, bleach, baking soda, baking powder, toothpaste, soap
What does 7-14 represent on the pH scale?
bases
What is the word used to describe when an acid or base might irritate your skin?
corrosive
the substance that dissolves is called the ........ and the substance that does the dissolving is called the ........
Solute and solvent
What is the difference between a physical change and a chemical change?
A chemical change cannot be reversed
What substance has a neutral pH and what is that number?
water , 7
what was the acid and base used in your titration experiment?
acid -HCL BASE - NaOH
What is an alkali? Give me an example
A base that dissolves in water example drain cleaner
Name 3 methods of separation
Distillation, evaporation, chromatography, filtration
What is crystallisation?
When a hot saturated solution cools down
which is more accurate universal indicator paper or litmus paper and why?
Universal - gives you a number to match on the pH scale
What colour does blue litmus paper turn in the presence of a base?
It stays blue!
What are the two products produced during neutralisation?
salt and water
what is a saturated solution?
no more solute can dissolve in the solvent
What is distillation used to separate?
alcohol and water (different boiling points)
Give 3 examples of neutralisation in every day life.
Nettle/dock, stomach acid/rennies, lime/acidic ground.
Name 5 pieces of equipment used in the acid base titration experiment
Burette, pipette, conical flask, pipette filler, white tile, funnel.
What are the two products produced when an acid reacts with a metal
Hydrogen gas and salt
define solubility
Solubility of a substance is the number of grams of the solute that dissolves in 100g of the solvent at a particular temperature.
What is filtration used for?
Separates an insoluble solid (soil) from a liquid (water)
List 4 examples of indicators used to determines acids and bases.
Litmus, universal, methyl orange, red cabbage