"The active ingredient in the Indicator Solution is Sulphide anions (S–). When mixed with water, reacts with lead cations (Pb++) to produce a distinctive brownish-black color. The chemical equation is as follows:
Na2S + H2O + Pb++ > PbS + Na+ + OH- + H2S ~
Sodium Sulphide mixed with water and lead produces lead sulphide (PbS). Bi- products in reaction include hydrogen sulfide H2S gas, sodium ions (Na+) and hydroxide ions (OH-)
Balanced equation: 2Na2S + 2H2O + Pb++ > PbS + 4Na+ + 2OH- + H2S"
I'm pretty sure that I'm screwed.
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