Question

5
compound name | formula | flame color
lithium chloride | licl | red
copper chloride | cucl? | green
calcium chloride | cacl? | orange - red
sodium chloride | nacl | orange
calcium carbonate | caco? | transparent blue
magnesium sulfate | mgso | transparent blue
potassium chloride | kcl | faint purple
borax | nabo? | blue to green (blue to orange)
copper sulfate | cuso? | deep blue to orange, green
cream of tartar | khc?h?o? | purple - orange, slight blue
unknown #1 | cacl? (sodium chloride) | orange
unknown #2 | nabo? (borax) | blue to green (blue to orange)
if you wanted to create fireworks that had blue and/or purple tints, which one of the following would you not include
a magnesium sulfate
b potassium chloride
c calcium chloride
d calcium carbonate

Explanation:

1. First, check the flame color of each option from the table:

• Magnesium Sulfate (MgSO): Flame color is Transparent Blue (has blue tint).
• Potassium Chloride (KCl): Flame color is Faint Purple (has purple tint).
• Calcium Chloride (CaCl): Flame color is Orange - Red (no blue or purple tint).
• Calcium Carbonate (CaCO₃): Flame color is Transparent Blue (has blue tint).

1. We need to find the compound that does not have blue or purple tint for fireworks with blue/purple tints. So Calcium Chloride is the one we would not include.

Answer:

C. calcium chloride