7. Based on what you know about the stoichiometry of ionic compounds, predict th

Question

7. Based on what you know about the stoichiometry of ionic compounds, predict the chemical formula of calcium hydroxide. 8. What information will you obtain in this experiment that will allow you to calculate the number of moles of calcium consumed? 9. What information will you obtain in this experiment that will allow you to calculate the number of moles of hydroxide produced through the reaction of Ca and water? 10. What algebraic equation allows us to find the number of moles of hydrochloric acid added during the titration from its volume and concentration? Remember, the symbol M (for molarity) is equivalent to mols/L

Explanation / Answer

7. Formula for Calcium hydroxide is Can(OH)2

Since Calcium is bivalent element and forms Ca+2 , hence formula a/c to Criss-cross method

8. Ca + 2 H2O = Ca(OH)2 + H2

with 1:2 moles of Ca and water gives one mole of calcium hydroxide.

9. Molarity is nothing but no of moles per liter solution

M= n x v ; M = Molarity , V= volume, n = no of moles

No of moles (n)= M / V

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