File Name: chemical reactions and equations worksheet .zip
In this lesson we will learn how to represent chemical reactions as word equations and formula equations. When magnesium burns, it reacts with oxygen in the air to form magnesium oxide. The arrow in a chemical equation indicates that a chemical change has converted the reactants on the left into the products on the right. The word equation describing the chemical reaction between baking soda and vinegar uses their scientific names: sodium hydrogen carbonate and acetic acid.
Search for:. Describing Chemical Reactions Using Equations. Learning Objective In this lesson we will learn how to represent chemical reactions as word equations and formula equations. Learning Outcomes By the end of this lesson you will be able to: Identify reactants and products in chemical reactions. Represent chemical reactions as word equations. Represent chemical reactions as formula equations. A chemical reaction involves one or more substances, known as reactants , interacting to form one or more new substances, known as products.
Chemical reactions may involve one or more reactants. Similarly, they may involve one or more products. Example Consider the chemical reaction that takes place when magnesium ribbon is burned. The magnesium ribbon reacts with oxygen in the air to form magnesium oxide.
Image: Capt. Instead, chemical reactions are more commonly described in an abbreviated form, known as a chemical equation. Chemical equations have several advantages: They are shorter and simpler to write. They follow a consistent format, so that different people represent the same reaction in the same way.
When using chemical symbols, they can be understood by people who speak different languages. Chemical equations can be understood by scientists all around the world. They are separated by an arrow , which shows that a chemical change has taken place. But this implies that the reactants and products are the same thing, which is incorrect! If there is more than one reactant or product, they are separated by a plus sign, as shown below.
There are two main types of chemical equations — word equations and formula equations. We will discuss both of these next. It is important that common names are not used. There are two main ways that chemical reactions can be described: In full sentences. As chemical equations. The general format of a chemical equation is: The reactants and products are separated by an arrow, which shows that a chemical change has taken place.
Question-1 What is the method of balancing chemical equation? Solution: Hit and trial method is used for balancing simple chemical equations. Question-2 Why is it necessary to balance a chemical equation? Solution: We know that, according to the law of conservation of mass, the total mass of all the atoms present in the reactants should be equal to that of all the atoms present in the products. This law will hold good only when the number of atoms of all types of elements on both sides is equal. Thus balancing of chemical equation is necessary so that the law of conservation of mass may be obeyed. Question-3 In the equations given below, state giving reasons, whether substances have been oxidised or reduced.
In this lesson we will learn how to represent chemical reactions as word equations and formula equations. When magnesium burns, it reacts with oxygen in the air to form magnesium oxide. The arrow in a chemical equation indicates that a chemical change has converted the reactants on the left into the products on the right. The word equation describing the chemical reaction between baking soda and vinegar uses their scientific names: sodium hydrogen carbonate and acetic acid. Search for:.
Iron Oxygen Ferric oxide. Features of a chemical equation:. The arrow head points towards the products and indicates the direction of the reaction. Skeletal chemical equation: A chemical equation which simply represents the symbols and formulas of reactants and products taking part in the reaction is known as skeletal chemical equation for a reaction. Combination Reaction : Two or more reactant combine to form a single product. Decomposition Reaction : A single compound decomposes or break down to give two or moresimpler substances. Oxidation Reaction: In oxidation reaction, addition of oxygen or removal of hydrogen or loss of electron takes place.
Write balanced chemical equations for each of the following descriptions of a chemical reaction. • You do not need to include the phases of the reactants or.
Quia Web allows users to create and share online educational activities in dozens of subjects, including Science. Chemical reactions are commonly written as equations Furthermore, a review of the overall reaction patterns presented in this table discloses only a broad and rather non-specific set of reactivity trends. These equations are coupled with the mole balances and rate law equations discussed in Chapter 6.
Give 5 examples each of physical and chemical changes that take place around us in our day to day life. When a magnesium ribbon is burnt in air, what are the two observations that you make?
They also experience its magic. On paper, those chemical reactions they see in the lab are summarized into balanced chemical equations. It can be a daunting lesson to teach. But to fully appreciate chemistry, the students also have to understand its working theories. What is the function of the parentheses in chemical equations What does the triangle stand for in chemical equations? Chemistry lectures and laboratory classes should go hand in hand.
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Chemical Reactions and Equations. SUMMATIVE ASSESSMENT. WORKSHEET Ans. 1: Rusting of Iron. (1). Ans. 2: Balanced Equation. 2FeSO4(s). Heat.
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In this page find chemical reactions and equations class 10 worksheet with answers. These are important questions you can practice for your board exams.