Chemistry, asked by mansi5556, 1 year ago

Calculate the number of Aluminium ions present in 0.051 gram of Aluminium oxide.

Answers

Answered by vineshiitbhu15
6

Aluminum oxide (Al2O3)


Attachments:

mansi5556: Can you explain the first step about 2 mole
vineshiitbhu15: Look at the stoichiometry of the reaction.. When 1mole of aluminum oxide dissociate it gives 2Al3+(2 moles of aluminum ion.
Answered by Anonymous
3
1 mole of aluminium oxide (Al2O3) = 2*27 + 3 * 16

= 102

i.e., 102 g of Al2O3 = 6.022 * 1023 molecules of Al2O3

Then, 0.051 g of Al2O3 contains =

= 3.011 * 1020 molecules of Al2O3

The number of aluminium ions (Al3+) present in one molecule of aluminium oxide is 2.

Therefore, the number of aluminium ions (Al3+) present in 3.011 * 1020 molecules (0.051 g ) of aluminium oxide (Al2O3) = 2 * 3.011 * 1020

= 6.022 * 1020

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