experiment

Question 1

random errors

Answer 1

affect PRECISION.
1) Uneven mixing even after swirling (local concentration pockets).
2) moment of disappearance judgement

Question 2

systematic errors:

Answer 2

affect ACCURACY:

1)we started stopwach after al the HCl was added. error as reaction going as poured in

2) stopwatch may not be properlly calibrated. may be consistently running a bit faster or slower

Question 3

validity

Answer 3

good bc only one variable was changed
- the concentration of sodium thiosulfate

Question 4

reproducability

Answer 4

unkown. need to see other group results

• if similar = reproducable

Question 5

repeatability

Answer 5

yes, bc each trial we had gave almost identical results. like not overally to long or fast.