CHEMICAL EQUATIONS. Chemical equations You are expected to know these names and formula:...
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Transcript of CHEMICAL EQUATIONS. Chemical equations You are expected to know these names and formula:...
![Page 1: CHEMICAL EQUATIONS. Chemical equations You are expected to know these names and formula: NameFormulaNameFormula WaterH2OH2OHydrchloric Acid HCl Carbon.](https://reader035.fdocuments.in/reader035/viewer/2022062715/56649d8c5503460f94a73a4d/html5/thumbnails/1.jpg)
CHEMICAL EQUATIONS
![Page 2: CHEMICAL EQUATIONS. Chemical equations You are expected to know these names and formula: NameFormulaNameFormula WaterH2OH2OHydrchloric Acid HCl Carbon.](https://reader035.fdocuments.in/reader035/viewer/2022062715/56649d8c5503460f94a73a4d/html5/thumbnails/2.jpg)
Chemical equations
You are expected to know these names and formula:
Name Formula Name Formula
Water H2O Hydrchloric Acid
HCl
Carbon Dioxide
CO2 Sulfuric Acid
H2SO4
Sulfur Dioxide
SO2 Nitric Acid HNO3
Sulfur Trioxide
SO3 Ethanoic Acid
CH3COOH
Nitrogen Dioxide
NO2 Ammonia NH4
![Page 3: CHEMICAL EQUATIONS. Chemical equations You are expected to know these names and formula: NameFormulaNameFormula WaterH2OH2OHydrchloric Acid HCl Carbon.](https://reader035.fdocuments.in/reader035/viewer/2022062715/56649d8c5503460f94a73a4d/html5/thumbnails/3.jpg)
Chemical Equations
All are written in this structure:Reactants Products(Starting materials) (what is produced)
![Page 4: CHEMICAL EQUATIONS. Chemical equations You are expected to know these names and formula: NameFormulaNameFormula WaterH2OH2OHydrchloric Acid HCl Carbon.](https://reader035.fdocuments.in/reader035/viewer/2022062715/56649d8c5503460f94a73a4d/html5/thumbnails/4.jpg)
Writing chemical equations
1. Identify the reactants and products by looking at information or observing the reaction carefully.
![Page 5: CHEMICAL EQUATIONS. Chemical equations You are expected to know these names and formula: NameFormulaNameFormula WaterH2OH2OHydrchloric Acid HCl Carbon.](https://reader035.fdocuments.in/reader035/viewer/2022062715/56649d8c5503460f94a73a4d/html5/thumbnails/5.jpg)
Writing chemical equations
1. Identify the reactants and products by looking at information or observing the reaction carefully.
2. Write a word equation. In word equations, the reactants and products are named.
![Page 6: CHEMICAL EQUATIONS. Chemical equations You are expected to know these names and formula: NameFormulaNameFormula WaterH2OH2OHydrchloric Acid HCl Carbon.](https://reader035.fdocuments.in/reader035/viewer/2022062715/56649d8c5503460f94a73a4d/html5/thumbnails/6.jpg)
Writing chemical equations
1. Identify the reactants and products by looking at information or observing the reaction carefully.
2. Write a word equation. In word equations, the reactants and products are named.
3. Decide on the symbols and formulae for the reactants and products and write a chemical equation with these symbols and formulae.
![Page 7: CHEMICAL EQUATIONS. Chemical equations You are expected to know these names and formula: NameFormulaNameFormula WaterH2OH2OHydrchloric Acid HCl Carbon.](https://reader035.fdocuments.in/reader035/viewer/2022062715/56649d8c5503460f94a73a4d/html5/thumbnails/7.jpg)
Writing chemical equations
1. Identify the reactants and products by looking at information or observing the reaction carefully.
2. Write a word equation. In word equations, the reactants and products are named.
3. Decide on the symbols and formulae for the reactants and products and write a chemical equation with these symbols and formulae.
4. Balance the equation if necessary.
![Page 8: CHEMICAL EQUATIONS. Chemical equations You are expected to know these names and formula: NameFormulaNameFormula WaterH2OH2OHydrchloric Acid HCl Carbon.](https://reader035.fdocuments.in/reader035/viewer/2022062715/56649d8c5503460f94a73a4d/html5/thumbnails/8.jpg)
Example
Magnesium and oxygen Word equation:
![Page 9: CHEMICAL EQUATIONS. Chemical equations You are expected to know these names and formula: NameFormulaNameFormula WaterH2OH2OHydrchloric Acid HCl Carbon.](https://reader035.fdocuments.in/reader035/viewer/2022062715/56649d8c5503460f94a73a4d/html5/thumbnails/9.jpg)
Example
Magnesium and oxygen Word equation: magnesium + oxygen
magnesium oxide Symbol equation:
![Page 10: CHEMICAL EQUATIONS. Chemical equations You are expected to know these names and formula: NameFormulaNameFormula WaterH2OH2OHydrchloric Acid HCl Carbon.](https://reader035.fdocuments.in/reader035/viewer/2022062715/56649d8c5503460f94a73a4d/html5/thumbnails/10.jpg)
Example
Magnesium and oxygen Word equation: magnesium + oxygen
magnesium oxide Symbol equation: Mg + O2 MgO
![Page 11: CHEMICAL EQUATIONS. Chemical equations You are expected to know these names and formula: NameFormulaNameFormula WaterH2OH2OHydrchloric Acid HCl Carbon.](https://reader035.fdocuments.in/reader035/viewer/2022062715/56649d8c5503460f94a73a4d/html5/thumbnails/11.jpg)
Example
Magnesium and oxygen Word equation: magnesium + oxygen
magnesium oxide Symbol equation: Mg + O2 MgO Balanced:
![Page 12: CHEMICAL EQUATIONS. Chemical equations You are expected to know these names and formula: NameFormulaNameFormula WaterH2OH2OHydrchloric Acid HCl Carbon.](https://reader035.fdocuments.in/reader035/viewer/2022062715/56649d8c5503460f94a73a4d/html5/thumbnails/12.jpg)
Example
Magnesium and oxygen Word equation: magnesium + oxygen
magnesium oxide Symbol equation: Mg + O2 MgO Balanced: 2Mg + O2 2MgO
![Page 13: CHEMICAL EQUATIONS. Chemical equations You are expected to know these names and formula: NameFormulaNameFormula WaterH2OH2OHydrchloric Acid HCl Carbon.](https://reader035.fdocuments.in/reader035/viewer/2022062715/56649d8c5503460f94a73a4d/html5/thumbnails/13.jpg)
Activity
1. Write down how many of each type of atom are present:
a) H2
b) CO2
c) N2
d) CH4
e) SO2
f) Al2O3
g) C3H8
![Page 14: CHEMICAL EQUATIONS. Chemical equations You are expected to know these names and formula: NameFormulaNameFormula WaterH2OH2OHydrchloric Acid HCl Carbon.](https://reader035.fdocuments.in/reader035/viewer/2022062715/56649d8c5503460f94a73a4d/html5/thumbnails/14.jpg)
Activity cont…
h) CuSO4
i) NOj) Fe2O3
k) Cu(OH)2
l) (NH4)2SO4
![Page 15: CHEMICAL EQUATIONS. Chemical equations You are expected to know these names and formula: NameFormulaNameFormula WaterH2OH2OHydrchloric Acid HCl Carbon.](https://reader035.fdocuments.in/reader035/viewer/2022062715/56649d8c5503460f94a73a4d/html5/thumbnails/15.jpg)
Remember!
Capital letters on their own represent elements.
![Page 16: CHEMICAL EQUATIONS. Chemical equations You are expected to know these names and formula: NameFormulaNameFormula WaterH2OH2OHydrchloric Acid HCl Carbon.](https://reader035.fdocuments.in/reader035/viewer/2022062715/56649d8c5503460f94a73a4d/html5/thumbnails/16.jpg)
Remember!
Capital letters on their own represent elements. Eg – CHO means 1 Carbon, 1 Hydrogen, & 1 Oxygen.
![Page 17: CHEMICAL EQUATIONS. Chemical equations You are expected to know these names and formula: NameFormulaNameFormula WaterH2OH2OHydrchloric Acid HCl Carbon.](https://reader035.fdocuments.in/reader035/viewer/2022062715/56649d8c5503460f94a73a4d/html5/thumbnails/17.jpg)
Remember!
Capital letters on their own represent elements. Eg – CHO means 1 Carbon, 1 Hydrogen, & 1 Oxygen.
Little numbers AFTER the letter mean that the element previous, has that amount. Eg – Cl2 means 2 lots of Cl.
![Page 18: CHEMICAL EQUATIONS. Chemical equations You are expected to know these names and formula: NameFormulaNameFormula WaterH2OH2OHydrchloric Acid HCl Carbon.](https://reader035.fdocuments.in/reader035/viewer/2022062715/56649d8c5503460f94a73a4d/html5/thumbnails/18.jpg)
Remember!
Capital letters on their own represent elements. Eg – CHO means 1 Carbon, 1 Hydrogen, & 1 Oxygen.
Little numbers AFTER the letter mean that the element previous, has that amount. Eg – Cl2 means 2 lots of Cl.
Big numbers in front of the compound mean you multiply the elements by it. Eg – 2NH4 = 2 N, 8H
![Page 19: CHEMICAL EQUATIONS. Chemical equations You are expected to know these names and formula: NameFormulaNameFormula WaterH2OH2OHydrchloric Acid HCl Carbon.](https://reader035.fdocuments.in/reader035/viewer/2022062715/56649d8c5503460f94a73a4d/html5/thumbnails/19.jpg)
Remember!
Capital letters on their own represent elements. Eg – CHO means 1 Carbon, 1 Hydrogen, & 1 Oxygen.
Little numbers AFTER the letter mean that the element previous, has that amount. Eg – Cl2 means 2 lots of Cl.
Big numbers in front of the compound mean you multiply the elements by it. Eg – 2NH4 = 2 N, 8H
Brackets are used the same way as maths. If there is a little number outside the bracket, you multiply whatever is inside the bracket. Eg -
![Page 20: CHEMICAL EQUATIONS. Chemical equations You are expected to know these names and formula: NameFormulaNameFormula WaterH2OH2OHydrchloric Acid HCl Carbon.](https://reader035.fdocuments.in/reader035/viewer/2022062715/56649d8c5503460f94a73a4d/html5/thumbnails/20.jpg)
Remember!
Capital letters on their own represent elements. Eg – CHO means 1 Carbon, 1 Hydrogen, & 1 Oxygen.
Little numbers AFTER the letter mean that the element previous, has that amount. Eg – Cl2 means 2 lots of Cl.
Big numbers in front of the compound mean you multiply the elements by it. Eg – 2NH4 = 2 N, 8H
Brackets are used the same way as maths. If there is a little number outside the bracket, you multiply whatever is inside the bracket. Eg – (NH4)3 means 3N, 12H
![Page 21: CHEMICAL EQUATIONS. Chemical equations You are expected to know these names and formula: NameFormulaNameFormula WaterH2OH2OHydrchloric Acid HCl Carbon.](https://reader035.fdocuments.in/reader035/viewer/2022062715/56649d8c5503460f94a73a4d/html5/thumbnails/21.jpg)
Answers
a) 2 Hb) 1 C, 2 Oc) 2 Nd) 1 C, 4 He) 1 S, 2 Of) 2 Al, 3 Og) 3 C, 8 Hh) 1 Cu, 1 S, 4 Oi) 1 N, 1 Oj) 2 Fe, 3 Ok) 1 Cu, 2 O, 2 Hl) 2 N, 8 H, S, 8 O
![Page 22: CHEMICAL EQUATIONS. Chemical equations You are expected to know these names and formula: NameFormulaNameFormula WaterH2OH2OHydrchloric Acid HCl Carbon.](https://reader035.fdocuments.in/reader035/viewer/2022062715/56649d8c5503460f94a73a4d/html5/thumbnails/22.jpg)
Activity
2. Write down the total number of atoms present in these:a) 2NO2
b) 3H2O
c) 4NH3
d) S8e) 2Ca3(PO4)2
f) 2CaCO3
![Page 23: CHEMICAL EQUATIONS. Chemical equations You are expected to know these names and formula: NameFormulaNameFormula WaterH2OH2OHydrchloric Acid HCl Carbon.](https://reader035.fdocuments.in/reader035/viewer/2022062715/56649d8c5503460f94a73a4d/html5/thumbnails/23.jpg)
g) 5C4H10
h) 2CH3OH
i) 2C6H12O6
j) 4MgCl2k) 4Na2CO3
l) 2H2SO4
![Page 24: CHEMICAL EQUATIONS. Chemical equations You are expected to know these names and formula: NameFormulaNameFormula WaterH2OH2OHydrchloric Acid HCl Carbon.](https://reader035.fdocuments.in/reader035/viewer/2022062715/56649d8c5503460f94a73a4d/html5/thumbnails/24.jpg)
Answers
a) 6 (2N, 4O)b) 9 (6H, 3O)c) 16 (4N, 12H)d) 8 (8S)e) 26 (6Ca, 4P, 16O)f) 10 (2Ca, 2C, 6O)g) 70 (20C, 50H)h) 12 (2C, 8H, 2O)i) 48 (12C, 24H, 12O)j) 12 (4Mg, 8Cl)k) 24 (8Na, 4C, 12O)l) 14 (4H, 2S, 8O)
![Page 25: CHEMICAL EQUATIONS. Chemical equations You are expected to know these names and formula: NameFormulaNameFormula WaterH2OH2OHydrchloric Acid HCl Carbon.](https://reader035.fdocuments.in/reader035/viewer/2022062715/56649d8c5503460f94a73a4d/html5/thumbnails/25.jpg)
Balance these
a) C + H2O CO + H2
b) Mg + O2 MgO
c) CH4 + O2 CO2 + H2O
d) CuO + H2 Cu + H2O
e) C2H6 + O2 CO2 + H2O
f) Mg + H2O Mg(OH)2 + H2
g) Fe2O3 + CO Fe + CO2
h) Fe + Cl2 FeCl3
![Page 26: CHEMICAL EQUATIONS. Chemical equations You are expected to know these names and formula: NameFormulaNameFormula WaterH2OH2OHydrchloric Acid HCl Carbon.](https://reader035.fdocuments.in/reader035/viewer/2022062715/56649d8c5503460f94a73a4d/html5/thumbnails/26.jpg)
Answers
a) C + H2O CO + H2
b) 2Mg + O2 2MgO
c) CH4 + 2O2 CO2 + 2H2O
d) CuO + H2 Cu + H2O
e) 2C2H6 + 7O2 4CO2 + 6H2O
f) Mg + 2H2O Mg(OH)2 + H2
g) Fe2O3 + 3CO 2Fe + 3 CO2
h) 2Fe + 3Cl2 2FeCl3