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A simple qualitative method to determine the presence of phosphate ions in a sample is as follows. A small amount of the sample is acidified with concentrated nitric acid, to which a little ammonium molybdate is added. The presence of phosphate ions is indicated by the formation of a bright yellow precipitate layer of ammonium phosphomolybdate ...
The solution is then treated with various reagents to test for reactions characteristic of certain ions, which may cause color change, precipitation and other visible changes. [ 1 ] [ 2 ] Qualitative inorganic analysis is that branch or method of analytical chemistry which seeks to establish the elemental composition of inorganic compounds ...
AS Level only CIE 8436: Thinking Skills: AS Level only; expired in 2007 CIE 8660: Research Project: AS Level only CIE 8663: Music: AS Level only CIE 8664: Portuguese: expired in 2006 CIE 8665: Spanish – First Language: AS Level only CIE 8666: Physical Education: AS Level only CIE 8667: Afrikaans Literature: AS Level only; expired CIE 8668 ...
The following is a list of GCE Ordinary Level subjects offered by Cambridge International Examinations (CAIE).You can choose from more than 40 subjects in any combination. [ 1 ] Cambridge O Levels, Cambridge IGCSE and/or Cambridge International Level 1 or Level 2 Certificates may be taken in the same examination session but certain combinations ...
A student typically studies four subjects at Cambridge International AS-Level and finishes three of those subjects at Cambridge International A-Level. Each subject a student completes receives a separate grade. The different grades are allocated according to "difficulty" in exams by applying a so-called "grade threshold" scheme.
Cations are positively (+) charged ions while anions are negatively (−) charged. This can be remembered with the help of the following mnemonics. Cats have paws ⇔ Cations are pawsitive. [23] Ca+ion: The letter t in cation looks like a + (plus) sign. [24] An anion is a negative ion. (An egative ion ⇒ Anion). [25]
Cambridge International Education (abbreviated CIE, informally known as Cambridge International or simply Cambridge and formerly known as CAIE, Cambridge Assessment International Education and CIE, Cambridge International Examinations) is a provider of international qualifications, offering examinations and qualifications to 10,000 schools in more than 160 countries.
Three levels of diploma—Pass Level, with Merit and with Distinction—are offered based on the number of points that a student receives; these points depend upon factors such as the grade earned in an AICE class and the level of the class taken. To successfully complete the curriculum, a student must achieve at least 140 points with a minimum ...
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