Acids & Bases
What is an acid?
A substance that gives off H⁺ ions and tastes sour.
What is a chemical reaction?
When substances change into new substances.
What is a diatomic element?
Elements that come in pairs of atoms.
What is the name of the element with symbol Br?
Bromine
What pH range are acids?
0 to 6.9
What is a base?
A substance that gives off OH⁻ ions and tastes bitter.
Name two signs of chemical change.
Color change, bubbles.
Name three diatomic elements.
Hydrogen, oxygen, nitrogen.
What is the name of the element with symbol Cl?
Chlorine
What pH range are bases?
7.1 to 14
Name two common acids.
Lemon juice, vinegar.
What is conservation of mass?
Matter is not lost or gained.
What is the memory trick?
"BrINClHOF
What is the name of the element with symbol H?
Hydrogen
What pH is neutral?
7
Name two common bases.
Baking soda, ammonia.
Name four factors affecting reaction rates.
Temperature, concentration, surface area, catalysts.
What state are bromine and iodine?
Bromine is liquid; iodine is solid.
What is the name of the element with symbol O?
Oxygen
Example of strong acid and base.
Battery acid and drain cleaner
What happens to litmus paper?
Acids turn blue paper red; bases turn red paper blue.
What is collision theory?
Particles must hit with enough energy and right way to react.
Why do diatomic elements pair?
They need a partner to be stable.
What is the name of the element with symbol I?
Iodine
Safety for strong acids/bases? what can it do to your skin ?
Can burn skin; handle carefully.