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© Boardworks Ltd 2003 Indicators: the pH scale This attaches a number called the pH value to each universal indicator colour. This means we can quickly say how acid or alkali a substance is by quoting a single number Strong acid NeutralStrong alkali Weak acidWeak alkali pH7 is neutral pH 1 is strongly acid pH14 is strongly alkali
© Boardworks Ltd 2003 Indicators: the pH scale
© Boardworks Ltd 2003 Will it be acidic, basic or neutral and how strong? SubstancepHDescription of acid / alkali Soda water6 Car battery acid1 Soap8 Washing soda10 Stomach acid2 Oven cleaner14 Vinegar4 very weak acid very strong acid very weak alkali weak alkali strong acid very strong alkali weak acid AlkaliAcid Indicators: the pH scale
The pH Scale? L/O – To know how the pH scale can be used to show acids and alkalis.
Scientific Method Hypothesis and Predictions Lesson 4 Indicators.
L4: pH scale Learning Objectives: 1.Use the pH scale to describe substances as weak or strong acids or alkalis. 2.Describe how universal indicator is used.
© Boardworks Ltd 2003 What is an acid? Here are some facts about acids. Strong acids are corrosive “eating away” at things like metal, stone and flesh!
© Boardworks Ltd of 20 © Boardworks Ltd of 34 What is an acid? Acids are a group of chemicals. What do you know about acids? Are all acids.
© Boardworks Ltd of 6. 2 of 6© Boardworks Ltd 2015 What is universal indicator? Universal indicator has a range of colors that show how weak or.
© Boardworks Ltd A slide contains teacher’s notes wherever this icon is displayed - To access these notes go to ‘Notes Page View’ (PowerPoint 97)
© Boardworks Ltd of 20 © Boardworks Ltd of 34 KS3 Chemistry 7E Acids and Alkalis.
ACIDS & ALKALIS. Acids & Alkalis Acids and alkalis are chemical opposites We can test whether a substance is acid or alkali by using an indicator. There.
1 of 10© Boardworks Ltd 2013 Acids and Alkalis.
D. Crowley, To know that indicators can be used to show acids and alkalis Monday, February 22, 2016.
Lesson: Acids and Bases. Science Differentiation in action All acids have a sour taste. Carbonic acidCitric acid.
Learning outcomes: To know what the pH scale is. Know how to measure pH Give examples of different acids and alkalis. Read page 56 and 57.
Exploring Science 7© Pearson Education Limited The pH scale indicates Ahow hot something is. Bhow acid or alkaline something is. Chow long something.
KS 3 laboratory Indicators De Lisle Catholic Science College Science department.
Acid Explosion Summary. © Boardworks Ltd of 31 The litmus test.
Do now! Can you look carefully through the test?.
Acid: Solutions that have more H⁺ ions than water and have pH values less than 7.
PH Acids and Bases. Acid Vs. Base Terms to describe chemicals 2 “extremes” of each other Cancel each other out (neutralize) Neutral substance = not acid.
© Boardworks Ltd of of 12© Boardworks Ltd 2009 What are indicators? Indicators are chemicals that change color in the presence of an acid.
Do now! Don’t forget you have a digestion test on Friday. Do some study whilst you are waiting.
Noadswood Science, Neutralisation To understand neutralisation reactions Friday, September 04, 2015.
PH Scale Standard: 5d-students know how to use the pH scale to characterize acid and base solutions.
1 of 17© Boardworks Ltd 2011 Acids and Alkalis. 2 of 17© Boardworks Ltd 2011.
© Boardworks Ltd 2003 Acids and Alkalis Multiple-Choice Questions `
ACIDS AND BASES Description of reactivity. pH SCALE POWER OF HYDROGEN MEASURES IONS (H+ / OH-) IONS: Electrically charged particles ACIDS … H+ BASES …
PH Worksheet Strength of Acids and Bases. 1. Is pure water an acidic, basic or neutral substance? Neutral.
Characteristics Of Acids Acids can be characterized by: 1.A sour taste. 2.It turns blue litmus paper red 3.It tastes sour. Try drinking lemon juice (citric.
PH. Heartburn? Heartburn occurs when the acid from our stomach travels back up our oesophagus. It’s also known as Acid Reflux.
PH. What is pH? pH is a measure of how acidic or basic a solution is pH of a solution is compared to the pH scale.
PH and Indicators Chemistry Mrs. Coyle. Basic 14>ph>7 Neutral ph=7 Acidic 1
PH. pH The strength of an acid or base is measured using a scale called pH. pH stands for ‘power of Hydrogen’ pH scale ranges from 0-14 Acids have.
© Boardworks Ltd of 31. © Boardworks Ltd of 31.
Acid Rain. What is acid rain? …precipitation with a pH below 5.6.
Indicators 1.Indicators are dyes which change colour when acidic or alkaline solutions are added to them. 2.Some common indicators are litmus, methyl orange,
Introduction to acids and alkalis S2 Chemistry Classifying chemicals and chemical reactions.
© Oxford University Press 2008 Vitamin C in fruit keeps skin healthy, protects sperm and helps make bones. 5.1a Acids: harmful or useful? Vitamin C is.
7E ACIDS AND ALKALIS. The pH scale What is the pH scale? What pH does an acid have? What pH does an alkali have? What is the neutral pH.
Introduction to Acids and Bases. Acid A substance that produces hydrogen ions, H + (aq), when it dissolves in water. Sour-tasting and good conductors.
Starter What colour is an Acid on the UI scale? What colour is an Alkali on the UI scale? What colour is Neutral on the UI scale?
Red Cabbage Indicator. Homemade indicator Equipment -Beaker of water -Mortar and pestle -Filter and filter paper -Bottle -Piece of Red Cabbage The best.
Acids & Bases They are everywhere.. In your food In your house EVEN IN YOU!!!!!
Section 16.2 Determining the Acidity of a Solution 1.To understand pH and pOH 2.To learn to find pH and pOH for various solutions 3.To use a calculator.
pH scale Measures the amount of H + in a solution. Scale used to measure whether a substance is an acid or a base. Lower numbers are acids. Higher numbers.
Acids / Bases Foster ESS Study this for the Quiz.
1 of 31© Boardworks Ltd of 31© Boardworks Ltd 2009.
14:40 CKS3: Yr7 Chemistry Unit 1 – Me the the Scientist! Lesson number: 4. Lesson Title: Acids and Alkalis Learning OutcomesHow I didTargets Learning Outcome.
1 of 11© Boardworks Ltd of 11© Boardworks Ltd 2009 Strong acids Acids can be strong or weak. Strong acids dissociate fully into solution, so that.
1)Sodium hydroxide is a strong alkali. In terms of ionisation, what is meant by the word strong? ( 1 mark) 2) You are given solutions of sodium hydroxide.
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