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03-31-2008, 12:23 AM
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| please help me with chemistry? 1. NaOH 2. NaCl 3. Pb (No3)2 4. MgSo4 5. Na2So4 6. KNO3 7. AgNO3 Determine the outcome (ppt or no ppt) for mixtures of all possible pairs of known solutions 1-7. For example, the mixture of 1 with 2 will give no-ppt, while the mixture of and 3 will give a ppt of Pb(OH)2. Organize your results so that they will be useful in rapidly identifying the unknown solutions described below. Suggestion: make 8*8 grid with the 7 unknowns. You are asked to identify the 4 unknown solution 1, 2, 3, 4 by mixing them together in pairs and observing the results. The 4 unknown solutions come from the list of 7 knowns. The results of the reactions of 4 unknowns are summarized below. Mistry Solution 1 had already been identified, it is MgSo4. Results of reactions of the 6 possible pairs sol1 + sol2 = no ppt sol1 +sol3 = ppt sol 1+ sol4 = no ppt sol 2 + sol3 = ppt sol2 + sol 4= ppt sol 3+ sol4 = no ppt what are the unknown solutions? Please give me your reasoning. Thanks a lot      |
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