PPT-Week 6 – Acids and Alkalis

1 Indicators and the pH scale Solutions can be acidic alkaline or neutral we get an  acidic  solution when an acid is dissolved in water we get an  alkaline  solution when an alkali is dissolved in water. 5734757347573473KRQH HEVLWH5737357347KWWS573735736257362ZZZ57361FROODERUDWLYHOHDUQLQJ57361RUJ 557347680055734725734765734735136573471573472855734771573477976 7KH57347SURMHFW57347LV57347D57347WHDFKHU57347QHWZRUN5735957347DQG57347D57347QRQ57360SUR57536 1. recall that, even before industrialisation, alkalis were needed to neutralise acid soils, . make chemicals . that bind natural dyes to cloth, convert fats and oils into soap and to . manufacture glass. Year 11. CONTENTS. Acidity and alkalinity. Indicators. pH. Acids. General methods for making salts. Making salts from metal oxides. Making salts from metal carbonates. Making salts from metals. Acids and Bases. REVISION. I have demonstrated ways of measuring and adjusting pH and can describe the significance of pH in everyday life.. SCN 3-18a. NEW LEARNING. I can . describe the dissociation of water into H. Starter:. What ions are found in acids?. What ions are found in alkalis?. What is the chemical formula for water? . give an example of a neutralisation reaction. use a pH meter to measure pH. observe the changes in pH during a neutralisation . Just remember…. CHEMISTRY IS GREAT!!!. I will email you a copy of this. So don’t copy notes for the sake of it! Just write down any extra bits you want. This is you!. C3. MENDELEEV:. Arranged by atomic mass. 3. understand that alkalis neutralise acids to make salts. 4. recall that soluble hydroxides and carbonates are . alkalis (Higher). 5. predict the products of the reactions of soluble hydroxides and carbonates with . Grade 10. Acids. Sour. Turn litmus red. pH less than 7. Dissolve carbonate rocks. Corrode metals . Conduct electricity. Acids. Acids are substances that give H. +. ions when added to water.. Alkalis. What is the pH scale?. What does it measure?. What range of values does it have?. How do you use the pH scale?. What can you use to measure pH?. Unit 4: Chemical Changes. L1: Acids and Alkalis. Learning Objectives:. a pure, dry sample of a soluble salt from an insoluble oxide or carbonate, using a Bunsen burner to heat dilute acid and a water bath or electric heater to evaporate the solution.. Required practical – Use PURPLE BOOKS. A need for a chemical is identified.. A “pilot plant” is set up to find out the requirements for production.. Costs are considered and balanced with potential profit. . A proper chemical plant is built costing millions of pounds but creating a lot of jobs. . Acids and Alkalis. REVISION. Acids, Bases and the pH Scale. Indicators from natural substances.. Everyday Neutralisation. Level 4. NEW LEARNING. Formation from oxides. Electrolysis of Acids. National 4. Patel Sikora. What are Alkali Metals?. The alkali metals are located in Group 1 of the periodic table. They are a series of chemical elements which have similar trends and properties. Alkali metals are so called because when they react with water alkalis (strong bases that can neutralize acids) are formed.. while alkalis produce an excess of hydroxide ions. At neutral pH 7 the two are equal. A 5% solution of baking soda in water exhibits a pH of about 8 measured by a pH meter. A solution with pH 8 is con