(a) Identify the cation in the unknown compound, and explain your thinking. (b) Identify the anion in the unknown compound, and explain your thinking. (c) Write the correct name for the unknown compound.
A student is given a solution containing an unknown ionic compound and told that the cation may be Na+, NH4+, Ca2+ or K+ while the anion may be NO3–, CO32–, PO43– or Cl–.
In a flame test, the flame does not change color.
When combined with NaOH and heated in a test tube, the vapor turns pH paper blue.
When drops of calcium chloride solution are added, a white precipitate forms.
When drops of silver nitrate are added, a white precipitate forms that dissolves and bubbles in nitric acid.
When drops of sodium carbonate are added, no precipitate forms.
When drops of sodium phosphate are added, no precipitate forms.
(a) Identify the cation in the unknown compound, and explain your thinking.
(b) Identify the anion in the unknown compound, and explain your thinking.
(c) Write the correct name for the unknown compound.
(d) Write the correct formula for the unknown compound.
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