When dilute hydrochloric acid is added to iron(ll)sulphide, the gas evolved will?
turn moist red litmus paper blue
turn lime water milky
blacken lead acetate paper
rekindle a glowing splint
burn a sqeakly pop
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FeS + 2HCl----->FeCl2 + H2S
The gas liberated is H2S which has the following characteristics;
➡It is colorless
➡Has smell of rotten eggs
➡Most importantly, in the presence of LEAD ETHANOATE PAPER, it gives a black coloration
When dilute hydrochloric acid (HCl) is added to iron(II) sulphide (FeS), the reaction produces iron(II) chloride (FeCl2) and hydrogen sulphide (H2S) gas. The balanced chemical equation for this reaction is:
FeS+2HCl→FeCl2+H2S
Hydrogen sulphide is a gas that has the characteristic property of blackening lead(II) acetate paper due to the formation of lead(II) sulphide, which is black.
So, the correct answer is C. blacken lead acetate paper. This is the observable effect that the evolved gas, hydrogen sulphide, would have.
A. test for base
B. test for co2
C. i had no idea, now i know
D. presence of 02
E. hydrogen gas present in most cases
correct answer
Hydrogen sulphide gas is evolved. Colourless gas with smell of rotten eggs. It turns lead acetate paper black.
