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The valency of Ca is 2 + . The valency of O is 2 тИТ . What is the simplified chemical formula of Calcium oxide?
Ca2тАЛO2тАЛ
CaO
CaO2тАЛ
Ca2тАЛO
CaO
The chemical formula of a compound is determined by the criss-cross method, where the valencies of the constituent elements are swapped and placed as subscripts. Since Calcium (Ca2+) and Oxygen (O2тИТ) have equal and opposite valencies of 2, they combine in a 1:1 ratio to form a neutral compound.
The chemical formula of a compound is determined by the criss-cross method, where the valencies of the constituent elements are swapped and placed as subscripts. Since Calcium (Ca2+) and Oxygen (O2тИТ) have equal and opposite valencies of 2, they combine in a 1:1 ratio to form a neutral compound.
Think of it like building a balanced structure where each Ca block has two 'hooks' and each O block has two 'slots'; one block of each perfectly completes the connection.
Valency Vow: Swap the numbers, reduce the ratio, balance the charge.
Ca2++O2тИТтЖТCaO тАФ Representation of the neutral ionic bond formation.
To form an ionic compound, the total positive charge must equal the total negative charge to ensure electrical neutrality. The process involves taking the numerical values of the valencies (ignoring signs), dividing by their greatest common divisor, and assigning them as subscripts. For Ca2+ and O2тИТ, the ratio is 2:2, which simplifies to 1:1, resulting in the formula CaO.
The sum of charges in a neutral compound must be zero.
Subscripts represent the ratio of atoms in the simplest whole number form.
Ionic compounds are represented by their empirical formula.
Predicts the composition of ionic compounds accurately.
Simplifies complex stoichiometry into integer ratios.
Production of quicklime (Calcium oxide) in industrial processes.
Used in steel making and chemical laboratory neutralizations.
Calcium oxide is commonly known as quicklime.
Option A (Ca2тАЛO2тАЛ) is not the simplest ratio, Option C (CaO2тАЛ) represents calcium peroxide, and Option D (Ca2тАЛO) is chemically incorrect for these ions.
B is correct тАФ The chemical formula is simplified to the lowest whole number ratio of atoms, resulting in CaO.
Always simplify subscripts in ionic formulas to their lowest whole number ratio, unless it is a specific polyatomic molecule like H2тАЛO2тАЛ (hydrogen peroxide).
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