CBSE Class 11-science Answered
Hello sir,
please clarify my doubt.
can you explain me in detail about stoichiometry and limiting reagents with examples for each.
Thank you.
Asked by seeni2005 | 28 Jul, 2020, 11:03: AM
Dear Student,
Please follow the given link to understand the concept and stoichiometry-
Now, Let's have a look on examples to solve the problems-
Question-1:
What is the amount of magnesium required to form 160 gram of magnesium oxide by burning magnesium in air?
Solution:
Mass of magnesium oxide = 160 gm
Reaction equation is;
4 moles of magnesium is required to form 160 gm of magnesium oxide.
![space space space space space space 2 Mg space space plus space space straight O subscript 2 space space rightwards arrow space space 2 MgO
space space space 2 space mole space space space space space 1 space mole space space space space 2 space mole
Moles space of space MgO space equals fraction numerator Mass space of space MgO over denominator Molar space mass end fraction
space space space space space space space space space space space space space space space space space space space space space space equals 160 over 40
Moles space of space MgO space equals space 4 space moles
2 space moles space og space MgO space requires space 2 space mole space of space Mg
4 space moles space og space MgO space will space require space space fraction numerator 4 cross times 2 over denominator 2 end fraction
space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals space 4 space moles space of space Mg](https://images.topperlearning.com/topper/tinymce/cache/5b19f96633c3354dfe237f84e85c26c3.png)
Question -2:
How many moles of Al2O3 will be formed when a mixture of 5.4g Al and 3.2g O2 is heated?
Kindly provide the answer.
Solution-
Answered by Ravi | 28 Jul, 2020, 18:14: PM
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