Acids, Alkalis And Titrations
Akopọ
From the sting of a wasp to the fizz of a dissolving antacid tablet, acids and alkalis are at work everywhere. Understanding what makes a substance acidic or alkaline, and knowing how to measure and neutralise that character, is one of the most practical skills chemistry offers.
In this lesson you will learn how indicators reveal pH, why acids produce hydrogen ions while alkalis produce hydroxide ions, and how a titration lets you find the exact volume of one solution needed to neutralise another. These ideas run through Edexcel Paper 1 and Paper 2 every session.
Awọn Afojusun
- describe the use of litmus, phenolphthalein and methyl orange to distinguish between acidic and alkaline solutions
- understand how to use the pH scale, from 0-14, can be used to classify solutions as strongly acidic (0-3), weakly acidic (4-6), neutral (7), weakly alkaline (8-10) and strongly alkaline (11-14)
- describe the use of universal indicator to measure the approximate pH value of an aqueous solution
- know that acids in aqueous solution are a source of hydrogen ions and alkalis in a aqueous solution are a source of hydroxide ions
- know that alkalis can neutralise acids
- describe how to carry out an acid-alkali titration
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Oriire fun ipari ẹkọ lori Acids, Alkalis And Titrations. Ni bayi ti o ti ṣawari naa awọn imọran bọtini ati awọn imọran, o to akoko lati fi imọ rẹ si idanwo. Ẹka yii nfunni ni ọpọlọpọ awọn adaṣe awọn ibeere ti a ṣe lati fun oye rẹ lokun ati ṣe iranlọwọ fun ọ lati ṣe iwọn oye ohun elo naa.
Iwọ yoo pade adalu awọn iru ibeere, pẹlu awọn ibeere olumulo pupọ, awọn ibeere idahun kukuru, ati awọn ibeere iwe kikọ. Gbogbo ibeere kọọkan ni a ṣe pẹlu iṣaro lati ṣe ayẹwo awọn ẹya oriṣiriṣi ti imọ rẹ ati awọn ogbon ironu pataki.
Lo ise abala yii gege bi anfaani lati mu oye re lori koko-ọrọ naa lagbara ati lati ṣe idanimọ eyikeyi agbegbe ti o le nilo afikun ikẹkọ. Maṣe jẹ ki awọn italaya eyikeyi ti o ba pade da ọ lójú; dipo, wo wọn gẹgẹ bi awọn anfaani fun idagbasoke ati ilọsiwaju.
- Which indicator turns pink in alkaline solution and is colourless in acid? A) Litmus B) Methyl orange C) Phenolphthalein D) Universal indicator Answer: C
- A solution has a pH of 2. It is best described as: A) Weakly acidic B) Strongly acidic C) Neutral D) Weakly alkaline Answer: B
- Which ion is responsible for making a solution acidic? A) OH- B) Na+ C) H+ D) Cl- Answer: C
- What is produced when an acid reacts with an alkali? A) Salt and hydrogen B) Salt and water C) Salt, water and carbon dioxide D) Salt and oxygen Answer: B
- In a titration, concordant results are readings that agree within: A) 1.0 cm3 B) 0.5 cm3 C) 0.1 cm3 D) 0.01 cm3 Answer: C
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Awọn Iwe Itọsọna Ti a Gba Nimọran
Ẹ̀kọ́ síwájú láti àwọn orísun ṣíṣí
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Abala ìwé ẹ̀kọ́
pH and pOH
Explain the characterization of aqueous solutions as acidic, basic, or neutral
"Chemistry: pH and pOH" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/chemistry/pages/14-2-ph-and-poh. Access for free at https://openstax.org/books/chemistry/pages/1-introduction
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Abala ìwé ẹ̀kọ́
Acid-Base Titrations
Interpret titration curves for strong and weak acid-base systems
"Chemistry: Acid-Base Titrations" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/chemistry/pages/14-7-acid-base-titrations. Access for free at https://openstax.org/books/chemistry/pages/1-introduction
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