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6 Cards in this Set
- Front
- Back
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Steps to the Empirical Formula |
1) Convert grams (%) of elements to mass
2) Divide each of STEP 1 by the smallest number of moles. Answer = your subscript.
3) If the answer ends in 0.3, multiply ALL of your answers by 3. If your answer ends in 0.5, multiply ALL of your answers by 2. |
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Phenolphthalein color |
Phenolphthalein = colorless; aciditic
Phenolphthalein = pink; base |
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Steps to the Molecular formula |
1) Requires the E. F. (Empirical Formula).
2) Calculate the E.F. Mass via (multiply subscript of each element by its atomic mass then add up all = EF mass).
3) "N" = (molar mass)/(E.F. mass) |
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Avogadro's number |
6.022x10^23 |
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PH of a solution |
Aciditic PH = < 7
Neutral PH is when - OH = H
Base PH = > 7 |
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How to calculate Molarity |
grams <---> MOLES <---> # molecules OR atoms |
