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QUAL Practice #1 May 2025

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For many of these questions you will need the reference tables (solubility, available reagents, etc.). These can be found in your QUAL packet and in your binder and as well as on Canvas in Reference and in the QUAL module.

Question 1
1.

When following your flow chart, all chemical testing will take place in

Question 2
2.

Question 3
3.

How do you get your flow chart approved or ask a question during testing days?

Question 4
4.

Question 5
5.

Question 6
6.

In a flow chart, what shape is used for a yes/no question?

Question 7
7.

In a flow chart, what shape is used when you have identified a chemical?

Question 8
8.

If you run out of room when flow charting, what symbol do you use to continue your flow chart elsewhere?

Question 9
9.

Question 10
10.

Which of the following would help you determine if ions are present in a solution?

Question 11
11.

Question 12
12.

For the next set of questions, be sure to write proper formulas including parentheses and subscripts as needed.

You can copy these arrows if you need to use them in your answers:

↑ ↓ ← →

Question 13
13.

BaCl2 + NaHCO3 are combined.
What is the formula & color of the precipitate that forms? If no precipitate forms, type NOR.

Question 14
14.

MgSO4 + Na2SO4 are combined.
What is the formula & color of the precipitate that forms? If no precipitate forms, type NOR.

Question 15
15.

Pb(NO3)2 + KI are combined.
What is the formula & color of the precipitate that forms? If no precipitate forms, type NOR.

Question 16
16.

NaOH + CoCl2 are combined.
What is the formula & color of the precipitate that forms? If no precipitate forms, type NOR.

Question 17
17.

KI + NaOH are combined.
What is the formula & color of the precipitate that forms? If no precipitate forms, type NOR.

Question 18
18.

CuSO4 + NaHCO3 are combined.
What is the formula & color of the precipitate that forms? If no precipitate forms, type NOR.

Question 19
19.

Write the formula for a white precipitate that is slightly soluble.

Question 20
20.

Write the formula for a yellow precipitate.

Choose all that apply.
During the testing days, clean up includes
refilling distilled water
wiping down surfaces
placing goggles in sanitizer
storing test tubes in SIN container if not finished testing
washing hands
scrubbing spot plates
rinsing test tubes if finished testing & answers are checked
If you want to indicate that a precipitate forms in a reaction, which symbol do you use?
←
→
↑
↓
(l)
(g)
(s)
(aq)
If you want to indicate that a gas forms in a reaction, which symbol do you use?
(g)
→
↑
↓
(s)
(l)
←
(aq)
Choose all that apply.
Which of the following will your teacher check when looking at a completed flow chart?
correct use of symbols
properly written formulas
color of precipitate formed
appropriate arrows (↑↓)
safety of proposed methods
Choose all that apply.
What gas is formed when the solubility table says 'FIZZ'?
CO2 ↑
O2 ↑
H2O
HOH
CO2 ↓
H2 ↑
H2 ↓
Choose all that apply.
Check all the insoluble ionic compounds.
BaI2
Ca(HCO3)2
Ca(NO3)2
PbI2
NaNO3
(NH4)2SO4
K2CO3
Mg(OH)2
MgSO4