
The balanced equation of the reaction when calcium phosphate is heated with a mixture of sand and carbon is given by:
A:
B:
C:
D:
Answer
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Hint: A balanced chemical equation is an equation that has the same number of reactants as well as products. Mass is always conserved; this means the chemical equation must be balanced. Because if the chemical equation will not be balanced it will have a different number of atoms on both sides which will cause imbalance of mass and law of conservation of mass will violate.
Complete step by step answer:
In this question we have to write a balanced chemical equation when calcium phosphate will be heated with a mixture of sand and carbon. Chemical formula of calcium phosphate is and sand is . Carbon is represented by . When calcium phosphate reacts with sand and carbon products formed are calcium silicate, carbon monoxide and phosphorus. Chemical formula of calcium silicate is , carbon monoxide is and phosphorus is . First let’s write reactants and products in form of an equation:
In the above reaction we find out that the number of atoms of calcium, oxygen and phosphorus are not balanced. Number of atoms of calcium, phosphorus and oxygen in reactants are respectively and the number of atoms of calcium, phosphorus and oxygen in products are respectively. To balance number of atoms of calcium and phosphorus molecules of should be and molecules of should be . The reaction is:
Now atoms of calcium and phosphorus are balanced but atoms of silicon and oxygen are imbalanced. To balance the number of atoms of silicon there should be molecules of . Now the reaction is:
Now atoms of all elements are balanced but atoms of oxygen are not balanced. To balance atoms of oxygen there should be molecules of and . Now the reaction is:
In this reaction atoms of all the elements are balanced this means this is the balanced chemical reaction.
So answer of this question is option A that is .
Note:
Law of definite proportions is also called the law of constant composition. According to this law a chemical compound always contains its components in a fixed proportion. This means chemical components have a definite ratio by mass and this doesn’t depend on their method of production.
Complete step by step answer:
In this question we have to write a balanced chemical equation when calcium phosphate will be heated with a mixture of sand and carbon. Chemical formula of calcium phosphate is
In the above reaction we find out that the number of atoms of calcium, oxygen and phosphorus are not balanced. Number of atoms of calcium, phosphorus and oxygen in reactants are
Now atoms of calcium and phosphorus are balanced but atoms of silicon and oxygen are imbalanced. To balance the number of atoms of silicon there should be
Now atoms of all elements are balanced but atoms of oxygen are not balanced. To balance atoms of oxygen there should be
In this reaction atoms of all the elements are balanced this means this is the balanced chemical reaction.
So answer of this question is option A that is
Note:
Law of definite proportions is also called the law of constant composition. According to this law a chemical compound always contains its components in a fixed proportion. This means chemical components have a definite ratio by mass and this doesn’t depend on their method of production.
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