Indicators?

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Can anyone help me, ive been asked these questions and im not to sure.Answers appreciated!!

Suggest an inictor for the following reactions:

1) Silver NItrate + NaCl -----> AgCl + NaNO2

2) Ca2+ + Y4- --------> CaY2- (where Y4- = EDTA anion)

Thanks!

2006-11-09 12:46:07 · 2 answers · asked by Stevie B 2 in Science & Mathematics ➔ Chemistry

2 answers

1) Sodium or potassium chromate. When the AgCl gets done reacting/precipitating in the light yellow solution, orange-brown Ag2CrO4 appears.

2) A dye called eriochrome black T; also called Mordant Black 11

2006-11-09 12:54:36 · answer #1 · answered by steve_geo1 7 · 0⤊ 0⤋

for the first equation
white percipitation is formed.

the second one
the shining metal will turn to white solids.

2006-11-09 12:54:22 · answer #2 · answered by Anonymous · 0⤊ 0⤋