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1. List possible manipulation errors that might contribute to the following errors in results:
1) obtaining a significantly larger amount of NaCl than was present in the original sample:

2) obtaining a significantly smaller amount of SiO2 than was present in the original sample.

2. Use the information in the table to answer the following questions.

-----------soluble in:------------------
----- cold water--hotwater--3MHCl--3MNaOh
benzoic acid --no----yes-------no-----yes--
Mg(OH)2 -----no-----no------yes-----no---
Na2SO4 -----yes----yes-------yes----yes--
Zn(OH)2 -----no-----no--------yes----yes--

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