Presentation is loading. Please wait.

Presentation is loading. Please wait.

Platinum Platinum Used in catalytic converters in cars. Platinum is more expensive than gold, which explains why catalytic converters are so expensive.

Similar presentations


Presentation on theme: "Platinum Platinum Used in catalytic converters in cars. Platinum is more expensive than gold, which explains why catalytic converters are so expensive."— Presentation transcript:

1 Platinum Platinum Used in catalytic converters in cars. Platinum is more expensive than gold, which explains why catalytic converters are so expensive to replace. Some catalytic converters are made from Palladium (Pd).

2 The tide of life is sometimes very rough but each storm ridden through makes us a better captain of our fate.

3 Things are not always what they seem!

4 Typoglycemia I cdnuot blveiee that I cluod aulacity uesdnatnrd what I was rdanieg The phaonmeneal pweor of the hmuan mnid Aoccdrnig to a rscheearch at Cmabrigde Uinervtisy, it deosn’t mttaer inwaht oredr the ltteers in a word are, the olny iprmoatnt tihng is that the frist and lsat ltteer be in the rghit pclae. The rset can be a taotl mses and you can still raed it wouthit a porbelm. This is bcuseae the huamn mnid deos not raed ervey lteter by istlef, buth the word as a wlohe. Amzanig huh? Yaeh and I awlyas thought slpeling was ipmoranttI cdnuot blveiee that I cluod aulacity uesdnatnrd what I was rdanieg The phaonmeneal pweor of the hmuan mnid Aoccdrnig to a rscheearch at Cmabrigde Uinervtisy, it deosn’t mttaer inwaht oredr the ltteers in a word are, the olny iprmoatnt tihng is that the frist and lsat ltteer be in the rghit pclae. The rset can be a taotl mses and you can still raed it wouthit a porbelm. This is bcuseae the huamn mnid deos not raed ervey lteter by istlef, buth the word as a wlohe. Amzanig huh? Yaeh and I awlyas thought slpeling was ipmorantt

5 Writing and Balancing Chemical Equations

6 Show what atoms, compounds or molecules are involved in the chemical reaction.Show what atoms, compounds or molecules are involved in the chemical reaction.

7 Signs of a chemical reaction OdorOdor Color ChangeColor Change Heat given off or AbsorbedHeat given off or Absorbed LightLight Gas given offGas given off Precipitate – a solid that forms from combining of two liquids.

8 Reactant Substances that undergoes a reaction.Substances that undergoes a reaction.

9 Product The new substance or substances that are formed from the reactants.The new substance or substances that are formed from the reactants.

10 Chemical equation Use of symbols to describe the chemical reaction.Use of symbols to describe the chemical reaction. EX: HC 2 H 3 O 2 (aq) + NaHCO 3 (aq) ----> NaC 2 H 3 O 2 (aq) + H 2 O (l) + CO 2 (g)EX: HC 2 H 3 O 2 (aq) + NaHCO 3 (aq) ----> NaC 2 H 3 O 2 (aq) + H 2 O (l) + CO 2 (g)

11 Endothermic Reactions Reactions where energy is consumed to allow the products to form.Reactions where energy is consumed to allow the products to form. Ex: Water + energy ---> hydrogen gas and oxygen gas.Ex: Water + energy ---> hydrogen gas and oxygen gas.

12 Exothermic reactions Reaction where energy is released.Reaction where energy is released. Ex: Glucose + oxygen ----> energy in our bodies.Ex: Glucose + oxygen ----> energy in our bodies. Ex: methane gas burns with oxygen to produce water and carbon dioxide.Ex: methane gas burns with oxygen to produce water and carbon dioxide.

13 Law of conservation of mass States that matter is neither created nor destroyed during a chemical reaction.States that matter is neither created nor destroyed during a chemical reaction.

14 Lavoisier Came up with the Law of Conservation of Mass.Came up with the Law of Conservation of Mass. Beheaded during the French Revolution.Beheaded during the French Revolution. Named oxygenNamed oxygen

15 Rules for balancing equations: Rule 1 Check to see if there are any single diatomic elements.Check to see if there are any single diatomic elements. [ Use subscript to denote.] NOF seven and Hydrogen[ Use subscript to denote.] NOF seven and Hydrogen

16 Rule 2 Check to see if compounds are balanced.Check to see if compounds are balanced. (Use subscripts to balance charges only)(Use subscripts to balance charges only)

17 Rule 3 Now balance the atoms on the left side of the yield sign with atoms on right side.Now balance the atoms on the left side of the yield sign with atoms on right side. (Use coefficient only)(Use coefficient only)

18 Problem Chlorine a gas reacts with aqueous sodium hydroxide to produce aqueous sodium hypochlorite, aqueous sodium chloride and liquid water.Chlorine a gas reacts with aqueous sodium hydroxide to produce aqueous sodium hypochlorite, aqueous sodium chloride and liquid water. Try and write out the equation.Try and write out the equation.

19 First check is there a single diatomic element: Cl 2 (diatomic and single) + NaOH (aq) -----> NaClO (aq) + NaCl (aq) + H 2 O (l)Cl 2 (diatomic and single) + NaOH (aq) -----> NaClO (aq) + NaCl (aq) + H 2 O (l) Next check the charges of the compounds are they balanced?Next check the charges of the compounds are they balanced?

20 If the compound are not equal to zero, use subscripts to balance. Na +1 OH -1 YesNa +1 OH -1 Yes Na +1 ClO -1 YesNa +1 ClO -1 Yes Na +1 Cl -1 YesNa +1 Cl -1 Yes 2 (H +1) O -2 Yes2 (H +1) O -2 Yes So we have:So we have: Cl 2 (g) + NaOH (aq) ---> NaClO (aq) + NaCl (aq) + H 2 O (l)Cl 2 (g) + NaOH (aq) ---> NaClO (aq) + NaCl (aq) + H 2 O (l)

21 Now use coefficient: Cl 2 (g) + 2NaOH (aq) -----> NaClO (aq) + NaCl (aq) + H 2 O (l)Cl 2 (g) + 2NaOH (aq) -----> NaClO (aq) + NaCl (aq) + H 2 O (l) BalancedBalanced

22 Problems : Problems : 1. C + O -----> CO 21. C + O -----> CO 2 2. H CO > H 2 O + CO 22. H CO > H 2 O + CO 2 WorkWork

23 Answers 1.1. C + O2 O2 O2 O2 ----> CO H 2 CO 3 2 CO > H 2 O H 2 O + CO 2

24 Problems Solid potassium reacts with liquid water to produce aqueous potassium hydroxide and hydrogen gas.Solid potassium reacts with liquid water to produce aqueous potassium hydroxide and hydrogen gas. WorkWork

25 Answer 2 K (s) + 2 H 2 O (l) > 2 KOH (aq) + H 2 (g)2 K (s) + 2 H 2 O (l) > 2 KOH (aq) + H 2 (g)

26 Problem Mg Cl (aq) + Ag NO 3 (aq) ---> Mg NO 3 (aq) + Ag Cl (s)Mg Cl (aq) + Ag NO 3 (aq) ---> Mg NO 3 (aq) + Ag Cl (s) WorkWork

27 Answer MgCl 2 (aq) + 2 Ag NO 3 (aq) + Mg (NO 3 ) 2 (aq) + 2 AgCl (s)

28 Question List the NOF seven (the diatomic elements).List the NOF seven (the diatomic elements).

29 Answer Hydrogen, Chlorine, Fluorine, Iodine, Nitrogen, Oxygen, Bromine, AstatineHydrogen, Chlorine, Fluorine, Iodine, Nitrogen, Oxygen, Bromine, Astatine

30 Question If you are making cookies and you mix butter, eggs, milk, flour, sugar, and chocolate chips. Which would be the reactants and which the product?If you are making cookies and you mix butter, eggs, milk, flour, sugar, and chocolate chips. Which would be the reactants and which the product?

31 Answer The cookies are the product. Everything else was the reactants.The cookies are the product. Everything else was the reactants.

32 Question 1. If you are baking cookies, is this an (exothermic or endothermic) reaction?1. If you are baking cookies, is this an (exothermic or endothermic) reaction? 2. If you light a firecracker, is this an (exothermic or endothermic) reaction?2. If you light a firecracker, is this an (exothermic or endothermic) reaction?

33 Answers 1. Endothermic1. Endothermic 2. Exothermic2. Exothermic

34 Question List some ways you might tell if a reaction has taken place.List some ways you might tell if a reaction has taken place.

35 Answer YouYou smell something, you see a gas, it fizzes, change color, a precipitate form, see light given off or energy is given off.

36 Thermite

37 Was that a chemical reaction? Why or Why Not Yes: There was light given off, heat and smoke


Download ppt "Platinum Platinum Used in catalytic converters in cars. Platinum is more expensive than gold, which explains why catalytic converters are so expensive."

Similar presentations


Ads by Google