Stoichiometry And Stoichiometric Calculations
Chapter Name : Some Basic Concepts Of Chemistry |
Sub Topic Code : 102_11_01_10_02 |
Topic Name : Stoichiometry And Stoichiometric Calculations |
|
Sub Topic Name : Limiting Reagent |
|
Introduction
Limiting reagent is the reactant in a chemical reaction which limits the amount of product formed.
Pre-Requisites:
Mass, atom, element, compound, molar mass, chemical formula, molar conversion.
Activity:
Observe how a candle when placed inside a closed jar extinguishing quickly.
Real Life Question:
Why can’t plants have photosynthesis at night? Why doesn’t a candle burn inside a closed jar for long?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Limiting reactant | Reactant in a chemical reaction which limits the amount of product formed. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Candle, closed jar | Put the candle inside the jar. Light the candle and close the jar. You would observe that the candle would extinguish after a while. This is due to the limited oxygen which is needed for the candle to burn. |
Real life uses :
Iron is coated with a film to prevent contact from oxygen. When the reaction of oxygen with Iron is stopped due to lack of oxygen, rusting doesn’t take place.
Places to visit :
Kitchen
Practical examples around us
| Examples | Explainations |
|---|---|
| plants | Plants cannot carry out photosynthesis at night due to the limitation of sunlight. |
What you learn in Theory:
Limiting reagent is the reactant which limits the further formation of the products once its consumed.
What you learn in Practice:
There should be enough supply of the limiting reactant in any chemical reaction for the reaction to proceed further.