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WorksheetsTesting for Ions Prelab
Total questions: 10
Worksheet time: 5mins
Water may contain ions. Which of the following is a polyatomic ion that may be found in water?
Ca2+
Mg2+
CH3COO-
NO3-
If magnesium and HCl(aq) react to form H2(g), and a burning splint placed in the gas produces a popping sound, this is a
negative test
positive test
conclusion
observation
The result for a positive test for the presence of a dissolved ion may include
an insoluble precipitate
a solid that won't dissolve
all of these
a colour change
The testing solutions are
AgNO3, KCl, BaCl2
BaCl2, KSCN, AgNO3
KCl, Na2SO4, Fe(NO3)3
Potassium chloride solution is used in this investigation to
provide a source of potassium ion.
to provide a source of an ionic compound.
provide a source of chloride ion.
provide a test solution for chloride ions.
To test for sulfate ion a solution of ___________ is used.
silver nitrate
barium chloride
postassium thiocyanate
To test for the presence of a chloride ion use a solution of ______________.
silver nitrate
barium chloride
potassium thiocyanate
What is the purpose of the iron (III) nitrate solution?
A source of nitrate ion.
A source of iron (II) ion.
A source of iron (III) ion.
A source of iron (III) ion to demonstrate a positive test.
Assuming that you complete the entire lab including the analysis and Understanding concepts, how many tables will you need to construct?
1
2
3
4
Which of the following is not available to you in the lab?
safety goggles
apron
unknown solutions
spot plates
