Then try our exam-style question on balancing equations, and check your answer against our answer scheme. Check out the worked examples in the video. No surprise: for this topic especially, lots of practice really helps. NOTE: You can only use big numbers to balance equations, not the small numbers you use when you’re working out the chemical formula for the compound.įor more discussion on balanced equations, have a look at our videos on this topic: AQA , Edexcel and OCR. Each video takes you through detailed worked examples. We’ve given two examples below of how it works – check them out. The best way to learn how this system works is to practise the steps. Repeat until you have the same number of every atom on the LHS as on the RHS.Every time you add a big number, you multiply the whole compound by that number, and so you adjust the numbers in the table accordingly.If the number of each atom on either side is NOT the same, you need to use big numbers in front of each element or compound to even them out.If the number of each atom on either side is the same, you’re all good, and the equation is balanced.Our favourite method is to use a table to tally the number of atoms of each element on the LHS of the equation and the RHS of the equation. There are several ways to approach a difficult equation. So the equation is balanced.īut sometimes, the answer isn’t obvious. This is clearly a balanced equation: there’s one carbon and two oxygen atoms on the LHS and the same on the RHS. For example, take the simple equation below: ![]() The number of atoms of each element on the right-hand side (RHS) of a chemical equation The number of atoms of each element on the left-hand side (LHS) of a chemical equation So what does this mean, exactly? In practical terms it means that: In case the original equation was unbalanced, the field with this equation is highlighted in light pink. The law of conservation of mass says that in a chemical reaction: the mass of the products This online Chemical Equation Balancer Calculator finds the stoichiometric coefficients to balance a given chemical equation, including equations with free electrons and electrically charged molecules (ions) as well as hydrated compounds. The law of conservation of mass and balancing chemical equations
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