Edexcel IGCSE Chemistry 復(fù)習(xí)筆記 2.7.5 Prepare a Soluble Salt Prepare a Soluble Salt A soluble salt can be made from the reaction of an acid with an insoluble base During the preparation of ...
Edexcel IGCSE Chemistry 復(fù)習(xí)筆記 2.7.4 Bases Bases What makes a base act like a base? Bases are substances which can neutralise an acid, forming a salt and water The term base and alkali are not th...
Edexcel IGCSE Chemistry 復(fù)習(xí)筆記 2.7.3 Reactions of Acids Reactions of Acids Reactions of acids with metals Only metals?above hydrogen?in the reactivity series will react with dilute acids T...
Edexcel IGCSE Chemistry 復(fù)習(xí)筆記 2.7.2 Acids, Bases & Protons Acids, Bases & Protons Proton transfer The earlier definition of an acid and a base can be extended In terms of proton t...
Edexcel IGCSE Chemistry 復(fù)習(xí)筆記 2.7.1 Solubility Rules Solubility Rules Ionic compounds are generally soluble in water compared to covalent substances, but there are exceptions A knowledge ...
Edexcel IGCSE Chemistry 復(fù)習(xí)筆記 2.6.3 Acid-Alkali Titrations Acid-Alkali Titrations Titrations are a method of analysing the?concentration?of solutions Acid-base titrations are one of the m...
Edexcel IGCSE Chemistry 復(fù)習(xí)筆記 2.6.2 Acids, Alkalis & Neutralisation Acids & Alkalis When?acids?are added to water, they form positively charged?hydrogen ions?(H+) The presence of ...
近些年來，一些選秀節(jié)目，歌唱類節(jié)目的火爆，也隨之推動了音樂的發(fā)展，越來越多的國內(nèi)的一些學(xué)校開始開設(shè)音樂專業(yè)，當(dāng)然國外也有很多歷史悠久的專業(yè)的音樂院校，美國的音樂教育制度非常完善，也涌現(xiàn)除了很多的音...
Edexcel IGCSE Chemistry 復(fù)習(xí)筆記 2.6.1 Indicators Two Colour Indicators Two colours indicators are used to distinguish between acids and alkalis Many plants contain substances that can act as indic...
Edexcel IGCSE Chemistry 復(fù)習(xí)筆記 2.5.4 Alloys Alloys Alloys are?mixtures?of metals, where the metals are mixed together physically but are not chemically combined They can also be made from ...
Cognitive Interview & Enhanced Cognitive Interview What is the cognitive interview? The cognitive interview (CI) is a method of interviewing eyewitnesses about what they can recall from ...
Eye Witness Testimony & Anxiety of the Witness Being a witness to a crime is likely to create anxiety in the witness. But how does this impact the accuracy of their recall? How does anxi...
