2
votes
1answer
42 views
During back titration pracs, how errors be minimised?
During back titration pracs, how errors be minimised?
3
votes
3answers
88 views
In terms of VCE, what is 86% considered as?
Today, I got back my SAC results for Chemistry and I scored 86%. Is that considered an "A"? What kind of grades will I need to achieve in order to gain a RAW score of 40+ ?
1
vote
1answer
22 views
Can I use C1V1 = C2V2 to find the concentration after a reaction?
Potassium permanganate reacts with hydrogen peroxide:
2MnO4–(aq) + 5H2O2(aq) + 6H+(aq) → 2Mn2+(aq) + 8H2O(l) + 5O2(g)
25.0 mL of 0.02 M KMnO4 solution is reduced by 20.0 …
2
votes
2answers
26 views
Why are we forced to do back titrations for ‘broad end points’ when ‘broadness’ is irrelevant (there is finally only one end point)
Why are non-sharp color changes in acid-base titration a bad thing that call for the experiment to be done via a back titration? Shouldn't it always just be about how close the ind …
3
votes
0answers
15 views
Why is the pH of something at its equivelance point not always 7
I've been reading this exact question online but don't understand. I seem to understand when people here explain it though. Apparently only a strong acid with a strong base produce …
1
vote
1answer
19 views
Why is an indicator attributed with a range of values
why is an acid-base indicator (like methyl orange) attributed with a range rather than a single pH which it changes colour at?
2
votes
2answers
13 views
How is it possible to figure out the products of a reaction between calcium carbonate and nitric acid?
Calculate the volume of carbon dioxide gas produced, at SLC, when 5.00g of calcium carbonate is added to a solution containing 5.00g of nitric acid.
I understand the basics of …
2
votes
2answers
48 views
Engage Tutoring
I am in year 11 and I am wondering if i could do 'Engage Tutoring' as its for year 12, so I wanted to know if i could still go there and get tutored for both year 11 and 12 subject …
3
votes
1answer
28 views
Determine the pH of the final solution if 100.0ml of 2.000x 10^-3 M sulphuric acid is added to 40.0ml of 4.825x10^-3 M barium hydroxide.
Determine the pH of the final solution if 100.0ml of 2.000x 10^-3 M sulphuric acid is added to 40.0ml of 4.825x10^-3 M barium hydroxide.
2
votes
1answer
50 views
What are some errors you might find in volumetric/gravimetric analysis experiments?
While performing an experiment, what are possible errors you might come across while doing a volumetric analysis and gravimetric analysis experiment?
3
votes
2answers
30 views
End Point vs Equivalence Point
What is the difference between the two?
3
votes
2answers
57 views
What is the empirical formula for the hydrocarbon if 11g of a hydrocarbon was completely burnt in air and 18g of water was produced.
11g of a hydrocarbon was completely burnt in air and 18g of water was produced. What is the empirical formula for the hydrocarbon?
3
votes
1answer
36 views
For VCE Chemistry, do we take into account the periodic table’s mass numbers for significant figure calculations?
This question arises because the Data Booklet for the VCE Chemistry exams gives atomic weights of atoms with 1 decimal place and, so, H is given as 1.0 g/mol. Does this mean that …
2
votes
1answer
30 views
How to find the half equations in the redox reaction between chlorine gas and water?
I want to find the half equations in the redox reaction between chlorine gas and water?
Cl2(g) + H2O(l) -> HOCl(aq) + HCl(aq)
3
votes
1answer
33 views
Finding the mass of oxygen from combustion
A 0.360 sample of an organic compound
containing carbon, hydrogen and oxygen
was burnt in excess oxygen. When the
gases evolved were passed through
anhydrous CaCl2 its m …
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