Place the metals in order of reactivity from most reactive at the top to least reactive at the bottom
Fe
Zn
Cu
Mg
Ca
Question 2
2.
The manganese oxide increases the rate of reaction as it is a _____________that provides an alternative reaction pathway of lower ______________________.
The gas is being collected in a ___________________________.
Another way to collect the gas would be by using a inverted _______________________in a water bath.
The gas could be tested using _____________________ .
The positive results would be ____________________________________
Other Answer Choices:
lime water going cloudy
graduated gas syringe.
catalyst
a lit splint
measuring cylinder
The glowing splint relighting.
limewater
a pop sound and water forming
activation energy
a glowing splint
Question 3
3.
To calculate the average rate of reaction
To measure the average rate of reaction over the first 30 seconds we would divide the __________________________________ by the .
Average rate = _______ / _______
Average rate = ______________.
Other Answer Choices:
time
30
1.3 cm3/s
40
total volume of oxygen at 30s
Question 4
4.
To calculate the rate of reaction at a specific time.
To calculate the rate of reaction at 30s.
We would draw a tangent at ________and then calculate the slope of the tangent using the formula: rate = _______________________________/ ___________________
Rate = _________ / _________
Rate = _______ / _______
Rate = ______________
Other Answer Choices:
30s
change in volume of oxygen
58
change in time
70-8
1.1 cm3/s
62
58-0
Question 5
5.
Silicon dioxide has a ___________________structure.
Silicon dioxide has a high melting point because many strong _____________ bonds need to be broken and a lot of energy is needed.
Other Answer Choices:
giant metallic
ionic
giant covalent
simple molecular
covalent
giant ionic
metallic
Question 6
6.
Continuous heating is needed to thermally decompose the hydrated zinc sulfate crystals.
This shows that the reaction is ________________
Other Answer Choices:
endothermic
exothermic
Question 7
7.
Other Answer Choices:
O2
Ar
N2
Question 8
8.
A bright __________ flame
The ______________________ magnesium reacts to form __________magnesium oxide.
Other Answer Choices:
silver
white
Question 9
9.
Classify the variable If this experimental technique was used to investigate different group 2 metal carbonates reactivates
Group II carbonate used
Volume of gas produced in 30s
time when volume was measured
amount of group 2 carbonate
Form of carbonate (powder / granule)
concentration of acid
Temperature of acid
Independent variable
dependent variable
Control variable
Question 10
10.
The positive result for the test is that ______________________________.
The reaction requires continued heating to occur so the reaction is ________________
Other Answer Choices:
from orange to colourless
exothermic
the limewater goes cloudy
endothermic
Question 11
11.
The test for chlorine is that _________litmus is bleached to __________.
Other Answer Choices:
white
damp
goes from orange to colourless
hot
Question 12
12.
To stop ____________ escaping.
Other Answer Choices:
CO2
HCl(aq)
HCl(g)
Question 13
13.
In which experiment was a lower concentration and an lower volume of gas used _________________.
In which experiment was the most concentrated acid used? _________________
In which two experiments was the total amount of acid used the same? A and _________________.
Other Answer Choices:
Experiment B
Experiment C
Experiment A
Question 14
14.
What is the independent variable? _________________
What is the independent variable? ______________________
Other Answer Choices:
Type of fuel
Question 15
15.
Other Answer Choices:
Activation energy
Energy change
Question 16
16.
Other Answer Choices:
long chain alkane
Alkene
Aluminium oxide catalyst
Delivery tube
Question 17
17.
What is the reason that ionic compounds have high boiling points?
Question 18
18.
What is the reason that ionic compounds can conduct electricity when molten?
Question 19
19.
Melting point of simple covalent substances
Question 20
20.
Reason why simple molecular substances do not conduct when molten
