Acid and Base
List three properties of acids
Have excess H+ ions, corrosive, sour, pH from 1-7 etc.
How do we divide the periodic table horizontally and vertically?
In groups and periods
SnO2+H2->Sn+H2O
1 SnO2+ 2 H2-> 1 Sn+ 2 H2O
If you are able to repeat the experiment in the same conditions and same environment with the same/similar results
What do acids and bases have to have in excess
What are the properties of metals?
Lustre, malleable, ductile, durable, conductive.
Balance the following:
Fe+H2SO4->Fe2(SO4)3+H2
2 Fe+ 3 H2SO4-> 1 Fe2(SO4)3+ 3 H2
What is the difference between repeatability and reproducibility
Reproducibility is where there is a different environment/different conditions
What are the products of a Metal + acid reaction
Draw a Bohr's Diagram of Ca2+
Check with teacher
Balance the following:
C4H10O+ O2 −> CO2+ H2O
1 C4H10O+ 6 O2 −> 4 CO2+ 5 H2O
Students wish to test the bounce of a ball, the decide to each throw a ball as hard as they could against a wall and compare their measurements.
Is this experiment repeatable and reproducible? Why? Why not?
No, would not receive similar/same results each time
No 'as hard as possible' is very subjective and difficult to reproduce.
Explain why both red and blue litmus paper need to be used
Red and blue litmus paper only respectively show base and acids and so in order to test for neutral substances both indicators need to be used.
Write the chemical formula for combustion of methane (CH4)
CH4+2O2->CO2+2H2O
Balance the following:
NH3+O2->NO+H2O
4 NH3+ 5 O2-> 4 NO+ 6 H2O
What is the IV/DV/CV for the following experiment:
Students wish to test whether the colour of a bird feeder affects the amount of seeds consumed.
IV: colour of bird feeder
DV: amount of seeds consumed
CV: time of day, location of bird feeders, type of feeders used.
What is the correct spelling of the indicator used to test only bases and turns clear solutions magenta
Phenolphthalein
Name 5 types of reactions
Corrosion, Neutralization, Combustion, Decomposition, Synthesis, Precipitation, Displacement/replacement
Balance the following:
(NH4)3PO4+Pb(NO3)4->Pb3(PO4)4+NH4NO3
4 (NH4)3PO4+ 3 Pb(NO3)4-> 1 Pb3(PO4)4+ 12 NH4NO3
Does repeatability and reproducibility ensure validity?
Why/Why not?
Provide an example
No, an experiment can be easily replicated with similar results however may miss their aim entirely.
Examples may vary.