igcse question explain why the metal calcium in chile

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2014/3/11· [2] [Total: 8] 6 Aluminium is an important metal with a wide range of uses. (a) Aluminium is obtained by the electrolysis of aluminium oxide dissolved in molten cryolite. carbon hode (–) oxygen given off at carbon anode (+) molten mixture of aluminium oxide and cryolite aluminium waste gases (i) Solid aluminium oxide is a poor conductor of electricity.

Caridge International Examinations Caridge International …

2 (a) A student investigates the reactivity of four different metals. She places pieces of calcium, copper, iron and zinc separately in dilute hydrochloric acid, as shown in Fig. 2.1. metal dilute hydrochloric acid. Fig. 2.1 (i) Place these four metals in order of reactivity, from most to least reactive. .

UNIVERSITY OF CARIDGE INTERNATIONAL EXAMINATIONS …

stage 1: add calcium carbonate to hot lemon juice stage 2: filter off the precipitate which is formed (calcium citrate) stage 3: wash the calcium citrate precipitate with water stage 4: add sulphuric acid to the calcium citrate to make a solution of citric acid

IIT Foundation & Olympiad Class 10 Chemistry Chapter 8 …

Get NCERT Solutions for Class 5 to 12 here. Visit us for detailed chapter-wise solutions of NCERT, RD Sharma, RS Agrawal and more prepared by our expert faculties at Toppr.

Edexcel iGCSE Chemistry: notes, flashcards, past papers, …

You can use reacting mass calculations to calculate the mass of calcium oxide produced when heating 25 g of calcium carbonate. CaCO 3 –> CaO + CO 2. Step 1: Calculate the amount, in moles, of 25 g of calcium carbonate (CaCO 3) Step 2: Deduce the amount, in moles, of CaO produced from 0.25 mol of …

Alloys - IGCSE Chemistry Revision

2013/1/7· It is more difficult for layers of atoms to slide over each other in alloys. Copper, gold and aluminium are too soft for many uses. They are mixed with other metals to make them harder for everyday use. For example: Brass - used in electrical fittings - is 70 per cent copper and 30 per cent zinc.

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2021/6/11· This question has been written by a Bitesize consultant as a suggestion to the type of question that may appear in an exam paper. Reveal answer

Question paper (Higher) : Paper 2 - Sample set 1

0 1 This question is about organic compounds. Hydrocarbons can be cracked to produce smaller molecules. The equation shows the reaction for a hydrocarbon, C 18H 38 C 18H 38 → C 6H 14 + C 4H 8 + 2 C 3H 6 + C 2H 4

O Level Chemistry: Metals - GCE O Level Singapore …

O Level Chemistry. Chap 14: Metals. Metals and Alloys. 1. Metals have a regular arrangement of closely packed positive ions surrounded by “a sea of mobile valence electrons”. Atoms in a metal are packed tightly in layers and held by strong metallic bonds. 2.

11 0620 43 RP

calcium nitrate, Ca(NO 3) 2, using the following steps. The relative formula mass, M r, of calcium nitrate, Ca(NO 3) 2, = 164. Calculate the nuer of moles of Ca(NO 3) 2 in 820 g.. mol Deduce the nuer of moles of NH 4 NO 3 M r 4

Methods of Metal Extraction | Edexcel IGCSE Chemistry …

Explanation: The Bauxite is first purified to produce Aluminium Oxide Al 2 O 3. Aluminium Oxide has a very high melting point so is dissolved in molten Cryolite to make the electrolyte with a lower melting point, as well as a better conductor of electricity than molten aluminium oxide. This reduces expense.

Edexcel International GCSE Chemistry - Pearson

2012/3/7· Metal and metal salt used Average temperature rise in C Zn + CuSO 4 12.2 X + CuSO 4 8.3 X + ZnSO 4 0.0 Cu + ZnSO 4 0.0 Zn + XSO 4 2.7 Cu + XSO 4 0.0 Use these results to identify the more reactive metal in each of the following pairs. (2)

CHEMISTRY 0620/31

7 Calcium carbonate reacts with dilute hydrochloric acid. CaCO 3(s) + 2HCl(aq) → CaCl 2(aq) + CO 2(g) + H 2O(I) A student investigated this reaction by measuring the volume of carbon dioxide released every minute at constant temperature. (a) Draw a diagram

gcse Question on The Extraction and Purifiion of …

Give balanced syol equations for the following word equations …. (1) Iron (II) oxide + carbon ==> iron + carbon dioxide. (2) Tri-iron tetroxide + carbon ==> iron + carbon dioxide. (3) Tri-iron tetroxide + carbon monoxide ==> iron + carbon dioxide. (I) Describe several uses of iron including steel. 2.

IGCSE and IAL Chemistry- IGCSE chemistry notes, A level …

Explain, in terms of intermolecular forces, why this is so Answer: ICl is a polar molecule, hence iodine monochloride has dipole dipole interactions. On the other hand chlorine molecules are non-polar and has only london forces present.

Pearson Edexcel International GCSE Chemistry

2017/1/18· 3 This question is about the reactivity of metals. (a) This apparatus can be used to compare the reactivities of different metals. heat mixture of metal and metal oxide A metal is heated with the oxide of a different metal. The table shows the results of two

Question paper (Higher) : Paper 2 - Sample set 1

0 1 This question is about organic compounds. Hydrocarbons can be cracked to produce smaller molecules. The equation shows the reaction for a hydrocarbon, C 18H 38 C 18H 38 → C 6H 14 + C 4H 8 + 2 C 3H 6 + C 2H 4

Question paper (Higher) : Paper 1 - June 2018

are formed by reacting metal oxides with acids. 0 1 . 1 [1 mark] Give one other type of substance that can react with an acid to form a soluble salt. 0 .1 Calcium nitrate contains the ions Ca 2 2+ and NO 3 – Give the formula of calcium nitrate. [1 mark] 0 1

Methods of Metal Extraction | Edexcel IGCSE Chemistry …

Explanation: The Bauxite is first purified to produce Aluminium Oxide Al 2 O 3. Aluminium Oxide has a very high melting point so is dissolved in molten Cryolite to make the electrolyte with a lower melting point, as well as a better conductor of electricity than molten aluminium oxide. This reduces expense.

gcse Metal Reactivity Series Worksheet of Questions …

(i) The green carbonate powder changes to a black powder at first, and (ii) after further strong heating, reddish-brown bits of a metal are formed. (a) Describe with the aid of syol equations what is happening in stage (i) and stage (ii). (b) Why is stage (i) called a

Question paper (Higher) : Paper 1 - June 2018

are formed by reacting metal oxides with acids. 0 1 . 1 [1 mark] Give one other type of substance that can react with an acid to form a soluble salt. 0 .1 Calcium nitrate contains the ions Ca 2 2+ and NO 3 – Give the formula of calcium nitrate. [1 mark] 0 1

11 0620 43 RP

calcium nitrate, Ca(NO 3) 2, using the following steps. The relative formula mass, M r, of calcium nitrate, Ca(NO 3) 2, = 164. Calculate the nuer of moles of Ca(NO 3) 2 in 820 g.. mol Deduce the nuer of moles of NH 4 NO 3 M r 4

Caridge International Examinations Caridge International …

3 Calcium reacts with nitrogen to form the ionic compound calcium nitride, Ca3N2. (a) Draw a diagram, based on the correct formula, which shows the charges on the ions and the arrangement of the electrons around the negative ion. Use o to represent an Use x

Pearson Edexcel International GCSE Chemistry

2017/1/18· 3 This question is about the reactivity of metals. (a) This apparatus can be used to compare the reactivities of different metals. heat mixture of metal and metal oxide A metal is heated with the oxide of a different metal. The table shows the results of two

gcse Question on The Extraction and Purifiion of …

Give balanced syol equations for the following word equations …. (1) Iron (II) oxide + carbon ==> iron + carbon dioxide. (2) Tri-iron tetroxide + carbon ==> iron + carbon dioxide. (3) Tri-iron tetroxide + carbon monoxide ==> iron + carbon dioxide. (I) Describe several uses of iron including steel. 2.

Extraction of Metals | CIE IGCSE Chemistry Revision Notes

The Calcium Carbonate in the limestone decomposes to form calcium Oxide: CaCO 3 (s) → CaO (s) + CO 2 (g) The Calcium Oxide reacts with the Silicon Dioxide, which is an impurity in the Iron Ore, to form Calcium Silie This melts and collects as a

Methods of Metal Extraction | Edexcel IGCSE Chemistry …

Explanation: The Bauxite is first purified to produce Aluminium Oxide Al 2 O 3. Aluminium Oxide has a very high melting point so is dissolved in molten Cryolite to make the electrolyte with a lower melting point, as well as a better conductor of electricity than molten aluminium oxide. This reduces expense.