Chemical Reactions
What side of the periodic table are the metals on
the left side
A substance with pH of 4 is considered a what?
an acid
What happened to magnesium when we placed it in hydrochloric acid?
the acid "ate" the magnesium and hydrogen gas was released
What is a safe place to store household chemicals?
Away from food, heat sources, and out of reach of children.
What element has the symbol Xe?
Xenon
A substance with a pH of 11 is considered a what?
base
When the oxygen in the air caused the steel wool to rust, what kind of reaction took place?
a synthesis reaction
What could happen to the environment if we poured toxic chemicals down the drain?
Harm drinking water, fish, etc.
What does the 8 beside the Oxygen symbol on the periodic table mean?
That oxygen has 8 electrons and 8 protons
What happens if you mix bleach (a base) with hydrochloric acid?
they neutralize
When lead (II) nitrate and potassium iodide are mixed, what happens?
bright yellow colour
Why is hydrochloric acid dangerous?
it is dangerous when breathed in and can burn the skin
Are acids sour or bitter?
sour (think lemons!)
What gas is produced when yeast is added to hydrogen peroxide?
oxygen
Where are the chemicals we use for science class stored?
in a separate rooms in the science wing (separate cabinets for acids and flammables)
List 4 things you could do to speed up a chemical reaction
increase temperature, decrease volume, increase concentration, increase surface area
Which acid is stronger, a pH of 1 or a pH of 4?
pH of 1
What happens when a lit splint is in the presence of hydrogen gas?
'pop' sound
How are the chemicals we use in science class disposed of?
They are put in labelled containers in a special room and a company comes to pick them up.