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Part Il (Answer briefly) 3 questions (30 points) 1.(10pt) Write the chemical formula and color as follows: Nickel sulfide Chromium hydroxide Bismuth hydroxide Cadmium sulfide Silver chloride 2.(10pt) Write and balance the chemical equations for the following reactions oFe (aq)+ OH (aq) aCd (aq) +S(aq) a AgCI(s)+NH,(aq) 4Cu (a)+NH,(aq 3. (10pt) In the following reaction at equilibrium: (aq) 2CrO, (aq, yellow) + 2 H, Cr,0,2 (aq, orange) +3 H,o 0) A. What color change do you observe when you add NaOH? B. How is this observation consistent with Le Chatliers principle? Briefly explain?
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licket Sut Pice is, black od Cmomiurm Pismotrs huckoxi de GiCou we (ii) od 2 +.ts*--→ cd S 3, ye (a) NaoH is a ro So e Poasar

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