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Do now! Don’t forget you have a digestion test on Friday. Do some study whilst you are waiting.
Last lesson Making and investigating indicators
Making an Indicator SubstanceColour (neutral) Colour with acid (HCl) Colour with alkali (NaOH) A good indicator ? Red cabbage purpleredgreenYes! Beetroot purple No! Coffee brown No!
Today’s lesson Measuring the strength of acids and alkalis The pH scale Using “Universal Indicator”
The pH scale The strength of an acid is measured on the pH scale pH stands for the “potential of hydrogen”
The pH scale pH stands for the “potential of hydrogen” strong acid weak acid weak alkali Strong alkali
To measure pH, we need an indicator that has a different colour for each value of pH Universal Indicator
It comes in the form of a paper
Universal Indicator It also comes in the form of a liquid
Measuring pH You are now going to measure the pH of various acids, alkalis and household liquids.
Measuring pH SubstancePredicted pH Colour of Universal indicator Actual pH
Do now! Can you spell the following words CORRECTLY in your book? Newtralisation, asid, alcali, litmas, indicater.
Safety in the Lab What is different about this classroom and every other classroom in your school?
Year 7 starter: THINK of a sentence using at least 2 of the following keywords indicator red acid purple colour green alkali neutral bleach lemon juice.
KS 3 laboratory Indicators De Lisle Catholic Science College Science department.
Ch 11 Acids & Bases Test Review. 1.Color Change; Universal indicator- yellow, orange and red Blue Litmus paper turns red 2.) Sour taste and conducts.
INDICATORS & pH: Part 2 What is the difference between an acid and a base? Acid: H 3 O + (hydronium) ion Base: OH - (hydroxyl) ion Acids: react with metals.
PH. Acids Anything that produces H 3 O+ ions if dissolved in water Taste sour Turns blue litmus paper red When acids dissolve in water, it donates a H+ion.
PH This is a rough measure of the acidity of a solution. The "p" stands for "potenz" (this means the potential to be) and the "H" stands for Hydrogen.
Acids & Bases By Robert McGee. Our Goals for today To determine the difference between Acids & Bases Discuss the importance of studying Acids & Bases.
PH. Heartburn? Heartburn occurs when the acid from our stomach travels back up our oesophagus. It’s also known as Acid Reflux.
TOPIC: pH 1. NaCl 2. C 2 H 5 OH 3. H 2 SO 4 4. NaOH 5. C 12 H 22 O CaI 2 7. HF 8. Mg(OH) 2 9. NH 3 10.CH 3 COOH Do Now: Identify as acid, base, salt,
Warm-Ups: October 1-5, 2012 How to Write a Conclusion.
Acids and Bases. Acids Acids are substances that release hydrogen ions, H +, in solution Acids are substances that release hydrogen ions, H +, in solution.
Sour to taste Turn litmus red Phenolphthalein stays colorless Electrolytes (conduct) React with some metals to form H 2 gas How do we recognize.
Four States of Matter Acids and Bases Generalized Formulas, PH Q $100 Q $200 Q $300 Q $400 Q $500 Q $100 Q $200 Q $300 Q $400 Q $500 Final Jeopardy Phase.
PH Scale In this presentation you will: explore how to measure the strength of acids and bases Next >
Of. and a to the in is you that it at be.
Noadswood Science, Sunday, October 12, 2014 To know how flame tests, the pH scale and solubility helps analytical scientists.
PH. pH—Scale to measure how acidic or basic a solution is 0-14 Pure water is 7 and neutral (not an acid or base) Acids—less than 7(lower number more acidic)
Mariam Al Thani 7A. The pH scale measures if something is an acid or a base on a scale of 1 to 14. The pH scale measures if something is an acid or a.
Indicators and pH To learn about pH and how indicators show a substance to be an acid or a base. Objective:
What are the characteristics of Acids & Bases? ACIDS BASES TASTE SOUR BITTER TASTE SOUR BITTER FEEL STINGSON SKIN SLIPPERY,SMOOTH FEEL STINGSON SKIN SLIPPERY,SMOOTH.
01. In a solution, the substance that is doing the dissolving is the ___.
ACIDS & BASES pH How We Measure Acids and Bases Blue Base.
pH Water Water is in equilibrium with its ions H 2 O(l) H + (aq) + OH - (aq) K w = [H + ][OH - ] K w = 1.0 x at 25°C In neutral solutions [H.
High Frequency Words List A Group 1. the of and.
Introduction to ACIDS and BASES Warm Up 1.Title your CB- What are Acids and Bases? 2.Write everything you know about the properties of acids and bases.
Acids & Bases They are everywhere.. In your food In your house EVEN IN YOU!!!!!
The. of and a to in is you that it he was.
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