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How many grams of water are produced when 35.8 grams of Calcium hydroxide reacts with lots of Hydrochloric acid?

Sagot :

Are produced 72 grams of water in this reaction.

Mole calculation

To find the value of moles of a product from the number of moles of a reactant, it is necessary to observe the stoichiometric ratio between them:

                          [tex]Ca(OH)_2 + 2HCl = > 2H_2O + CaCl_2[/tex]

Analyzing the reaction, it is possible to see that the stoichiometric ratio is 1:2, so we can perform the following expression:

[tex]MM_{Ca(OH)_2} = 74.1g/mol[/tex]

                                           [tex]MM = \frac{g}{mol}[/tex]

                                             [tex]74.1 = \frac{35.8}{mol}\\mol = 2[/tex]

So, if there are 2 mols of Ca(OH)2:

                                  Ca(OH)2    |    H2O

                                          [tex]\frac{1mol}{2mol} =\frac{2mol}{xmol}[/tex]

                                             [tex]x = 4mol[/tex]

Finally, just find the number of grams of water using your molar mass:

[tex]MM_{H_2O} = 18g/mol[/tex]

                                              [tex]18= \frac{m}{4}\\m = 72g[/tex]

So, 72 grams are produced of water in this reaction.

Learn more about mole calculation in: brainly.com/question/2845237

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