Question

you will then determine the chemical responsible for the flame color.
flame test data table

substance formula flame color

1 potassium chloride kcl purple
2 strontium nitrate sr(no₃)₂ red
3 copper ii sulfate cuso₄ green
4 sodium carbonate na₂co₃ orange
5 potassium nitrate kno₃ purple
6 strontium chloride srcl₂ red
7 sodium nitrate nano₃ orange
8 copper ii nitrate cu(no₃)₂ green
9 potassium sulfate k₂so₄ purple
10 copper i chloride cucl green
11 sodium chloride nacl orange
solutions sorted by color
orange green purple red
na₂co₃ cuso₄ kcl sr(no₃)₂
nano₃ cucl₂ kno₃
what chemical is responsible for the flame color? cu, k, na, or sr?
na sodium cu copper k potassium sr strontium

Explanation:

Step1: Analyze orange - colored substances

Orange - colored substances are $Na_2CO_3$, $NaNO_3$ and $NaCl$, all of which contain sodium ($Na$).

Step2: Analyze green - colored substances

Green - colored substances are $CuSO_4$, $CuCl_2$, $Cu(NO_3)_2$, all of which contain copper ($Cu$).

Step3: Analyze purple - colored substances

Purple - colored substances are $KCl$, $KNO_3$, $K_2SO_4$, all of which contain potassium ($K$).

Step4: Analyze red - colored substances

Red - colored substances are $Sr(NO_3)_2$ and $SrCl_2$, all of which contain strontium ($Sr$).

Answer:

The chemical responsible for orange flame color is $Na$ (sodium), for green is $Cu$ (copper), for purple is $K$ (potassium) and for red is $Sr$ (strontium).