1. reacting with their ions:
Group 17 atoms
reacting with their ions:
F,Cl,Br,I ions

2. First reaction

3. Now add calcium nitrate to each tube
NaF
NaCl
NaBr
NaI
Now add calcium nitrate to each tube

4. Added calcium nitrate to each tube.
NaF
NaCl
NaBr
NaI
Added calcium nitrate to each tube.

5. Calcium nitrate + sodium fluoride = a precipitate
What could it be?
Calcium nitrate + NaF === calcium fluoride + sodium nitrate
which is the precipitate???”
Now balance the equation!

6. Second Reaction

7. Now add silver nitrate to each tube
NaI
NaBr
NaCl
NaF
Now add silver nitrate to each tube

8. Added silver nitrate to each tube
NaCl
NaF
NaI
NaBr
Added silver nitrate to each tube

9. NaCl + silver nitrate = sodium nitrate + silver chloride
What could be causing the
precipitate in the tubes?
Added silver nitrate
NaI
NaBr
NaCl
NaCl + silver nitrate = precipitate
NaBr + silver nitrate = precipitate
NaI + silver nitrate = precipitate
NaCl + silver nitrate = sodium nitrate + silver chloride
Which one is the precipitate?

10. Another reaction 1st add ammonium hydroxide to each of the
tubes containing precipitates, then later add
sodium thiosulfate to each one

11. 1. Now add ammonium hydroxide to each tube. 2. Now add sodium
thiosulfate
to each tube.

12. AgCl + ammonium hydroxide = precipitate dissolves….
AgBr + sodium thiosulfate = precipitate dissolves
AgI doesn’t dissolve with either solution.
You can try to predict what the balanced equations might be.