Stoichiometry And Stoichiometric Calculations
Chapter Name : Some Basic Concepts Of Chemistry |
Sub Topic Code : 102_11_01_10_01 |
Topic Name : Stoichiometry And Stoichiometric Calculations |
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Sub Topic Name : Stoichiometry And Stoichiometric Calculations |
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Introduction
In stoichiometry, we mainly talk about the quantity (how much) of reactants and products are there in a chemical reaction. We can interconvert mass into moles into molecules and vice versa. We can also make volume calculations.
Pre-Requisites:
Mass, atom, element, compound, molar mass, chemical formula
Activity:
Observe plants around and write down the equation of photosynthesis. Observe how a piece of iron left out in the open rusts. Chemical reaction between iron (Fe) and Oxygen (O).
Real Life Question:
How much oxygen is produced when plants carry out photosynthesis if you give them 10 grams of CO2?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| stoichiometry | Quantity of reactants and products are there in a chemical reaction. |
| Balanced chemical equation | Equal number of atoms of each element on both sides of a chemical equation. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Any substance, e.g. mixing salt in water | Observe how the salt crystals mix into the water. Write down a reaction for this. |
Real life uses :
Stoichiometric calculations help to find out the amount of any reactant or product in a chemical reaction.
Places to visit :
Observe how a piece of iron left out in the open rusts
Practical examples around us
| Examples | Explainations |
|---|---|
| Iron rusting | Iron is metal which forms an oxide when exposed to oxygen in the air. The reddish brown coating seen on it is iron oxide. |
What you learn in Theory:
In stoichiometry, we mainly talk about the quantity (how much) of reactants and products are there in a chemical reaction. We can interconvert mass into moles into molecules and vice versa. We can also make volume calculations.
What you learn in Practice:
Stoichiometric calculations give us an estimate of how much reactants we need to mix to get the desired amount of product.