12 Questions
Why is it important for a chemical equation to be balanced?
To follow the law of conservation of mass
What does a balanced chemical equation ensure about the number of atoms of each element?
They remain the same before and after the reaction
What does a double displacement reaction involve?
Exchange of ions between reactants to form new products
In a chemical equation, what does oxidation refer to?
Loss of electrons by a species
In a double displacement reaction, how do the atoms get rearranged?
Atoms remain the same, they only change partners
What type of reaction takes place when barium chloride and sodium sulphate solutions are mixed?
Double displacement reaction
What is the product formed when sodium hydroxide solution reacts with hydrochloric acid solution?
Sodium chloride solution
Why is it important to balance chemical equations?
To equalize the mass of reactants and products
When balancing a chemical equation, why are physical states like (s), (l), (g), and (aq) mentioned?
To provide information about the physical state of reactants and products.
In the balanced equation 3Fe(s) + 4H2O(g) → Fe3O4(s) + 4H2(g), why is (g) used with H2O?
To signify that H2O is present as steam.
Why are reaction conditions like temperature, pressure, catalyst, etc., sometimes indicated in a chemical equation?
To provide additional information about the reaction process.
Why is it mentioned that physical states are usually not included in a chemical equation unless necessary?
To avoid overcrowding the equation with unnecessary details.
Test your knowledge on balanced chemical equations and the law of conservation of mass in chemistry. Identify and balance chemical equations to ensure mass is conserved in reactions.
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