Chemical Reactions
The Periodic Table
Acids & Bases
Class Experiments
Chemicals
100
What type of reaction is it when two substances come together to make one? (hint: think marriage)
synthesis
100
What side of the periodic table are the metals on
the left side
100
A substance with pH of 4 is considered a what?
an acid
100
What happened to magnesium when we placed it in sulphuric acid?
the acid "ate" the magnesium and hydrogen gas was released
100
What is a safe place to store household chemicals?
Away from food, heat sources, and out of reach of children.
200
What type of reaction causes a substance to break down into smaller elements? (hint: think divorce)
decomposition
200
What element has the symbol Xe?
Xenon
200
A substance with a pH of 11 is considered a what?
base
200
When the oxygen in the air caused the steel wool to rust, what kind of reaction took place?
a synthesis reaction
200
What could happen to the environment if we poured toxic chemicals down the drain?
Harm drinking water, fish, etc.
300
What is the reaction where a substance comes along and bumps out another substance in a compound? (hint: think new wife)
single displacement
300
What does the 8 beside the Oxygen symbol on the periodic table mean?
That oxygen has 8 electrons and 8 protons
300
What happens if you mix bleach (a base) with hydrochloric acid?
they neutralize
300
When we mixed lead (II) nitrate and potassium iodide what happened?
bright yellow colour
300
Why is sulphuric acid dangerous?
it is dangerous when breathed in and can burn the skin
400
What is the chemical reaction when two substances swap partners? (think: two couples swapping and remarrying)
double displacement
400
Which elements are good conductors, metals or nonmetals?
metals
400
Are acids sour or bitter?
sour (think lemons!)
400
the phenolphthalein turned pink in what substance?
bases
400
Where are the chemicals we use for science class stored?
in 3 separate rooms in the science wing (separate rooms for acids and flammables)
500
List 4 things you could do to speed up a chemical reaction (hint: think date video)
increase temperature, decrease volume, increase concentration, increase surface area
500
Which element has more protons, nickel (Ni) or silver (Ag)?
silver
500
Which acid is stronger, a pH of 1 or a pH of 4?
pH of 1
500
What concentration of hydrochloric acid dissolved the magnesium faster? 20% of 5%?
20%
500
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.
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