The Periodic Table Depth of
What is the
themeling points of the halogens?
Due the themeling and boiling points in the table to deduce the state of the halogens at-400
write your answers in the table
Dan now in the Sth column to show the trend in the depth of colour (light - dark).
d. Drawn arrow in the 6th column to show the trend in atomic radius (smaller --- larger).
22. Complete these sentences about the displacement reactions of halogens using words from the list
bromine chloring colourless halide halogen
less
more orange
When aqueous
is added to a
solution of potassium
has been displaced
bromide the solution turns
because
This is because
reactive
displaces a reactive
halogen from an aqueous solution of its
b. What would you observe when an aqueous solution of bromine is added to an aqueous solution of potassium
lodide? Explain these observations

first, consult an activity series chart to determine if al is more reactive than fe. it is, so it will replace the fe. now, one can continue with the problem.

next, make sure you have a correctly balanced equation.

3feo + 2al ==> 3fe + al2o3

now, determine which reactant (feo or al) is in limiting supply.

moles feo present = 125 g x 1 mole/71.8 g = 1.74 moles

moles al present = 25.0 g x 1 mole/26.98 g = 0.927 moles

since from the balanced equation, it take 3 mol feo for every 2 mol al, al will be limiting.

you can determine this simply by dividing moles of each by their coefficient in the balanced equation. for example: 1.74/3 = 0.58 and 0.927/2 = 0.464. al is less, so it is limiting.

finally, using the stoichiometry in the balanced eq. determine mass of fe that can be produced from 0.927 moles of al.

0.927 moles al x 3 moles fe/2 moles al x 55.8 g/mole = 77.6 g

you did not give any options thus this is the best answer i can give to you with this little information you have given

> they are both natural and not man made

> they can be tracked and predicted by the right tools

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a is the correct answer

answerleaving cheese out to get moldy;