Advertisements
Advertisements
Question
What does the symbol (aq) represent in a chemical equation?
Advertisements
Solution
In some chemical equations, (aq) is written as a symbol after a few reactants or products. This simply represents that we have used the chemicals with water. For example, consider the following chemical reaction:
\[\ce{Ag^+_{ (aq)} + Cl^-_{ (aq)} -> AgCl_{(s)}}\]
In the above reaction, silver and chlorine are used in aqueous solution to form solid Silver chloride.
APPEARS IN
RELATED QUESTIONS
State whether the following statement is true or false:
A chemical equation can be balanced easily by altering the formula of a reactant or product.
What is meant by a chemical reaction? Explain with the help of an example.
State one characteristic of the chemical reaction which takes place when dilute sulphuric acid is added to barium chloride solution.
Balance the following chemical equation:
\[\ce{Pb(NO3)2_{(s)} ->[Heat] PbO_{(s)} + NO2_{(g)} + O2_{(g)}}\]
Write word equation for the following skeletal equation:
\[\ce{Ca + O2 → CaO}\]
Balance the following equation .
N2 + O2 → NO
Balance the following equation. Also name the product formed.
` "H"_2"O"_2 → "H" _2 "O" + "O"_2`
Write your observation and name the product when ron nails are added to an aqueous solution of copper sulphate.
Raisins are wiped off gently before final weighing with the help of
Balance the following equation:
Ca + N2 → Ca3N2
Balance the following equation:
Pb3O4 + HCl → PbCl2 + H2O + Cl2
Write the balanced chemical equation of the following reaction. sodium hydroxide + sulphuric acid → sodium sulphate + water
Write the balanced chemical equation of the following reaction.
Potassium permanganate + hydrochloric acid → potassium chloride + manganese chloride + chlorine + water
Give a balanced equation for addition of iron to copper [II] sulphate solution. State the change in colour seen.
In certain reaction a change of state is observed i.e. solid to liquid, liquid to gas etc. – State the change of state of the products – to give the respective reactant.
2H2 + O2 → 2H2O
Underline the compound in the equation given below, it is incorrectly balanced and write the correct balancing for the same.
PbO2 +4HCl → PbCl2 + H2O + Cl2
Write an Explanation.
Balanced equations
Match the columns.
| Reactants | Products | Types of chemical reaction | ||
| 1. | MgH2 | → | Mg + H2 | Endothermic |
| 2. | 2H2S + SO2 | → | 3S + 2H2O | Oxidation |
| 3. | CaO + H2O | → | Ca(OH)2 + heat | Exothermic |
| Redox | ||||
Which of the following is the correct observation of the reaction shown in the above set up?
Complete the following blank in the equation as indicated.
\[\ce{CaH2_{(s)} + 2H2O_{( aq)}-> Ca(OH)2_{(s)} + 2H2_{(g)}}\]
Molecules: 6.02 × 1023 + ______ `→` ______ + ______
