Balancing Chemical Equations (how-to, examples, & practice problems) 🧪🧪🧪
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5 سال پیش
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One of the major problems
One of the major problems people have when balancing equations is in the use if coefficients and subscripts. We can only change the coefficients (the numbers in front of the chemical formulas) when we balance.
One of the best ways to start balancing an equation is to divide the equation between reactants (the left side of the equation) and products. You then count of the number of each type of atom on the reactants and products sides. This ensures you’ll accurately keep track of everything while balancing.
Helpful Videos
• More on Coefficients & Subscripts: The Difference between Coefficients a...
• Playlist with more practice: More Practice Balancing Equations
• Na +Cl = NaCl Balancing and Writing the Equation fo...
• BaCl2 + Al2(SO4)3 = BaSO4 + AlCl3 Balancing BaCl2 + Al2(SO4)3 = BaSO4 +...
• C4H10 + O2 = CO2 + H2O Balancing C4H10 + O2 = CO2 + H2O (But...
A common question is where to start when faced with a new chemical equation. The process of balancing is somewhat trial and error but there are a few helpful ways to start. First, if you have Oxygen atoms these usually best left for last. The same with single elements like Fe, Cu, Na, etc. Other than that, start balancing where is seems most obvious.
For chemical equations with polyatomic ions that appear on both sides of the equation, like:
CuSO4 + NaOH → Cu(OH)2 + Na2SO4 you can count the polyatomic ions (the SO4 and the OH) as one item. This will result in having smaller numbers to balance and make balancing much easier. You still get the same coefficients when you’re done.
For come reactions, often combustion reactions, using a fraction to balance the oxygen atoms (which you left to do last!) can be helpful. Once you have the equation completed you can multiple by a whole number to convert the coefficients and remove the fraction. The ratio, what we’re most interested in with chemical equations, will be the same.
One of the best ways to start balancing an equation is to divide the equation between reactants (the left side of the equation) and products. You then count of the number of each type of atom on the reactants and products sides. This ensures you’ll accurately keep track of everything while balancing.
Helpful Videos
• More on Coefficients & Subscripts: The Difference between Coefficients a...
• Playlist with more practice: More Practice Balancing Equations
• Na +Cl = NaCl Balancing and Writing the Equation fo...
• BaCl2 + Al2(SO4)3 = BaSO4 + AlCl3 Balancing BaCl2 + Al2(SO4)3 = BaSO4 +...
• C4H10 + O2 = CO2 + H2O Balancing C4H10 + O2 = CO2 + H2O (But...
A common question is where to start when faced with a new chemical equation. The process of balancing is somewhat trial and error but there are a few helpful ways to start. First, if you have Oxygen atoms these usually best left for last. The same with single elements like Fe, Cu, Na, etc. Other than that, start balancing where is seems most obvious.
For chemical equations with polyatomic ions that appear on both sides of the equation, like:
CuSO4 + NaOH → Cu(OH)2 + Na2SO4 you can count the polyatomic ions (the SO4 and the OH) as one item. This will result in having smaller numbers to balance and make balancing much easier. You still get the same coefficients when you’re done.
For come reactions, often combustion reactions, using a fraction to balance the oxygen atoms (which you left to do last!) can be helpful. Once you have the equation completed you can multiple by a whole number to convert the coefficients and remove the fraction. The ratio, what we’re most interested in with chemical equations, will be the same.
5 سال پیش
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