Match the organic compounds to the correct pictures Match the organic compounds to the correct pictures. Write down your answers. 1. alcohol 2. carboxylic acid 3. ester A B D C E -COOH G F -OH H I J K -COO- 1

5.1 Organic Chemistry Objective: to identify organic compounds, and explain their properties and reactions Outcomes: All: I can list some uses of alcohols, carboxylic acids and esters (D/E) Most: I can identify and name alcohols, carboxylic acids and esters (C) Some: I can explain some reactions of alcohols, carboxylic acids and esters (A/B) Keywords: organic compounds, alcohol, carboxylic acid, ester, pH Homework: Haber Process worksheet Due: Thursday 2 May 2 2 2 2 2 2

What is an organic compound? These are all examples of organic molecules… Can you see what they have in common? A ‘backbone’ of CARBON ATOMS I can identify and name alcohols, carboxylic acids and esters (C) 3 3

Naming Organic Compounds These ones you have met before… Which 2 groups of molecules (homologous series) are they each from? Can you name them? ALKANES -ane C-C ethene ethane ALKENES -ene C=C I can identify and name alcohols, carboxylic acids and esters (C) 4 4

Naming Organic Compounds Number of Carbon Atoms in Chain Remember the carbon naming…? Number of Carbon Atoms in Chain Start of Molecule Name 1 Meth- 2 Eth- 3 Prop- 4 But- methane ethane propane butane I can identify and name alcohols, carboxylic acids and esters (C) 5 5

Naming Organic Compounds This one you might know…. ALCOHOL -ol -OH ethanol Can you think of any uses of alcohols? fuels What about this one? methanol drinks I can identify and name alcohols, carboxylic acids and esters (C) 6 6

Properties & Reactions of Alcohols COMBUSTION Complete the equation: ethanol + oxygen → _________ + _______ Write the balanced symbol equation: carbon dioxide water What kind of reaction is this? DEMO BURNING ETHANOL AND PROPANOL ON WATCH GLASS C2H5OH + O2 → CO2 + H2O 3 2 3 I can explain some reactions of alcohols (A/B) 7 7

Properties & Reactions of Alcohols pH7 What is the pH of alcohol in water? What do you observe when sodium is added? DEMO ADDDING UNIVERSAL INDICATOR TO WATER; demo sodium added to ethanol in test tube.. Explain that alcohols can be oxidised by the air or by using chemicals, this forms carboxylic acids. What gas is formed? HYDROGEN GAS I can explain some reactions of alcohols (A/B) 8 8

Naming Organic Compounds This one is a CARBOXYLIC ACID CARBOXYLIC ACID - anoic acid -COOH ethanoic acid Can you think of any uses of carboxylic acids? What about this one? vinegar propanoic acid I can identify and name alcohols, carboxylic acids and esters (C) 9 9

Properties & Reactions of Carboxylic Acids What do you observe when 1moldm-3 HCl is added to calcium carbonate? What do you observe when 1moldm-3 ethanoic acid is added to calcium carbonate? But slower… Demo adding HCl to CaCO3. Demo adding Ethanoic acid to CaCO3 Strong and weak acid… what is the difference.. Strong ionises completely.. Weak ionises partially.. ALL turned to H+, only a few turned to H+ (what makes an acid an acid) Explain that alcohols can be oxidised by the air or by using chemicals, this forms carboxylic acids. What gas is formed? CARBON DIOXIDE GAS pH2-5 What is the pH of carboxylic acid in water? I can explain some reactions of carboxylic acids (A/B) 10 10

of Carboxylic Acids and Alcohols Reactions of Carboxylic Acids and Alcohols + ESTER yl -anoate alcohol c.acid -COO- → Add ester to hot water and show that it smells fruity ethyl ethanoate I can explain some reactions of carboxylic acids and alcohols (A/B) I can identify and name alcohols, carboxylic acids and esters (C) 11 11

Use of esters perfumes flavourings biofuels Can you think of any uses of esters? perfumes flavourings biofuels I can list some uses of alcohols, carboxylic acids and esters (D/E) 12 12

Match the organic compounds to the correct pictures Match the organic compounds to the correct pictures. Have you changed your mind? 1. alcohol 2. carboxylic acid 3. ester A B D C E -COOH G F -OH H I I can identify (C) and list some uses of alcohols, carboxylic acids and esters (D/E) J K -COO- 13

How did you do…? 1. alcohol 2. carboxylic acid 3. ester A B D C D E -COOH G F -OH H I I can identify (C) and list some uses of alcohols, carboxylic acids and esters (D/E) J K -COO- 14