how to use igcse question explain why the metal calcium
Using Flame Tests to Identify Metal Ions - Video & Lesson
GCSE Chemistry: Practice & Study while substances containing calcium turn more of a yellow-red color. Explain why the type of metal used in creating fireworks determines the colour seen
FACTFILE: GCSE CHEMISTRY: UNIT 2
FACTFILE:˜˚˛˝˜˙ˆˇ˘ GCSE fiflfi CHEMISTRY : UNIT 2.1˙ˆˇ˘ fifi fifi˜˚˛˝˙ˆˇ˛ˆ˘˚ˇ 6 By using experimental data it is possible to place metals in a reactivity series. A tick 3 represents a reaction and an 7 represents no reaction. Metal X Metal Y Metal Z X sulfate 7 7 Y sulfate 3 3 Z sulfate 3 7 Metal X displaces both Y and Z – so it must be the most reactive and be at
Why is calcium metal usually more reactive than magnesium
Sep 24, 2006· Calcium has 20 electrons on its outershell, its electronic configuration is 2,8,8,2. Magnesium on the other hand has 12 electrons with its electronic configuration being 2,8,2. Calcium has 4 shells, while magnesium has 3. Because calcium has more shells, it is easier for it to lose electrons than magnesium even though they both in group 2.
GCSE CHEMISTRY - The Reactivity Series - Metal
the metals are competing for the non-metal anion. In the above examples the non-metal anion is sulfate - SO 4 2-. Reactions using chlorides or nitrates can also be used. The order of the metals in the reactivity series can be worked out by using these type of reactions. For example, tin would be seen to displace lead from lead chloride
Why is calcium more reactive than magnesium? - Quora
Mar 04, 2018· Calcium has 20 electrons on its outershell, its electronic configuration is 2,8,8,2. Magnesium on the other hand has 12 electrons with its electronic configuration being 2,8,2. Calcium has 4 shells, while magnesium has 3. Because calcium has more
Testing for ions - ScienceAid
Some of these compounds are used in firework productions. Record your observation. It just shows the procedure of how to do it, but the results are not in there. They used other ions in the experiment so that is why the answers that I am looking for is not in there. I have tried: Nothing actually.
May 01, 2019· metal colour of metal observation in water A silver coloured fizzing B silver coloured a small nuer of bubbles form C silver coloured no fizzing D red-brown coloured no fizzing Figure 2 The four metals are known to be calcium, copper, magnesium and silver. Use the data to give the names of the metals A, B, C and D. (3) A
Question paper (Foundation) : Paper 2 - Sample set 1
The marks for questions are shown in brackets. You are expected to use a calculator where appropriate. You are reminded of the need for good English and clear presentation in your answers. When answering questions 03.1, 10.6, 13.2 and 14 you need to make sure that your answer: ‒ …
stochiometry theory - LinkedIn SlideShare
Mar 11, 2018· The mass of the ﬂask and contents was recorded every minute. cotton wool to prevent drops of acid spray escaping flask 40cm3 of hydrochloric acid, 2.0mol/dm3 20.0g of small lumps of calcium carbonate balance The mass of carbon dioxide given off was plotted against time. 0 0 time mass of carbon dioxide CaCO3(s) + 2HCl(aq) CaCl2(aq) + H2O(l
Edexcel iGCSE Chemistry: notes, flashcards, past papers
1:21 identify an element as a metal or a non-metal according to its position in the Periodic Table; 1:22 understand how the electronic configuration of a main group element is related to its position in the Periodic Table; 1:23 Understand why elements in the same group of the Periodic Table have similar chemical properties
Chemistry help? | Yahoo Answers
Feb 01, 2016· Industrially vanadium metal which is used in steel alloys can be obtained by reacting vanadium oxide with calcium at high temperatures. In one process 1.54x10^3 g of vanadium (V) oxide reacts with 1.96x10^3 g of calcium. A) Write a balanced chemical equation for this reaction. B) calculate the theoretical yield of V. C) calculate the percent yield of 803g of V are obtained.
3 - Rust and rust-protection - IGCSE Chemistry
And rust can''t form on Iron in water without Oxygen (such as the very deep ocean) which is why so much of the Titanic is still there over 100 years after it sank. In the experiment to the left - the water in A was boiled to remove Oxygen and then sealed with oil to stop more dissolving.
GCSE Grade - ExamQA
GCSE AQA Grade Materials For this paper you must have: Ruler Pencil and Rubber Scientific calculator, which you are expected to use when appropriate Instructions Answer all questions Answer questions in the space provided All working must be shown Information The marks for the questions are shown in brackets Name: CHEMISTRY Mark Date: www
IGCSE Chemistry: Reactivity Series
Apr 23, 2012· You can also: add a small piece of the metal to some cold water. If there is any rapid reaction, then the metal must be above magnesium in the reactivity series. If there isn''t any reaction, add a small amount of the metal to some dilute hydrochloric acid or dilute sulphuric acid. If there isn''t any reaction in the cold, warm/heat it carefully.
Acids and Metal Carbonates Worksheet - EdPlace
Metal carbonates such as calcium carbonate (chalk) react with acids to produce the gas carbon dioxide. This can be seen in the equation: Metal carbonate + Acid Salt + Water + Carbon dioxide. The carbon dioxide produced can be tested for in the lab using limewater, which reacts with the carbon dioxide gas.
Jun 09, 2014· Worksheet 9.1 The blast furnace Coursebook questions 9.1 to 9.8 and End-of-chapter questions 3, 4, 5 and 6 Exercise 9.1 Metal alloys and their uses Topic 2 …
electrolysis of molten lead bromide products electrode
5. The electrolysis of molten lead(II) bromide. The products of electrolysing lead bromide are lead metal and bromine gas. You can electrolyse molten compounds as long as they are ionic compounds, so that on melting there free ions to move to carry the current to facilitate the electrolysis process of splitting the compound into its constituent elements.
Centre Nuer Candidate Nuer Edexcel GCSE Chemistry
Answer the questions in the spaces provided – there may be more space than you need. Informationt t The total mark for this paper is 60. The marks for each question are shown in brackets – use this as a guide as to how much time to spend on each question.t Questions labelled with an asterisk (*) are ones where the quality of your
Flashcards - GCSE Chemistry ***NEED TO FINISH***
Explain how the use of calcium carbonate in the mixture decreases atmospheric pollution (2) sulphur dioxide is removed by reaction with calcium carbonate , this means there is less acid rain the scientists report claimed that using concrete sleepers instead of …
Caridge International Examinations Caridge
Answer the following questions using only the elements or compounds in the list. Explain why zinc metal reacts with copper(II) 6 Calcium chlorate(V), Ca(Cl O 3) 2, is made by reacting calcium hydroxide with chlorine gas. 6Ca(OH) 2 + 6Cl 2 Ca(Cl O 3) 2 + 5CaCl 2
Calcium - Wikipedia
Calcium is a chemical element with the syol Ca and atomic nuer 20. As an alkaline earth metal, calcium is a reactive metal that forms a dark oxide-nitride layer when exposed to air.Its physical and chemical properties are most similar to its heavier homologues strontium and barium.It is the fifth most abundant element in Earth''s crust and the third most abundant metal, after iron and
Acids, Bases and Salts - ------ GCE Study Buddy ------ The
i. explain why dry hydrogen chloride gas is neutral ii. explain why aqueous hydrogen chloride is acidic iii. describe how sodium carbonate can be used to confirm that an aqueous solution contains an acid 1b. The oxides of elements may be acidic, basic, or amphoteric. Give the name and formula of one example of each of these three types of oxide
GCSE – NEW - Revision Science
(ii) Explain why the resin in ion exchange stops working after continued use.  (c) A litre bottle of mineral water contains 184 mg of dissolved calcium sulfate, CaSO 4. Calculate the nuer of moles of calcium sulfate present. Give your answer to three significant figures. 1 mg = 00. 01 g [2 ] A r(Ca) = 40 A r(S) = 32 A r(O) = 16
Gcse biology paper 1 aqa triple 2018 unoffical markscheme
AQA GCSE Biology 8461 - Paper 1 - 14th May 2019 AQA Biology GCSE Triple Higher Paper 2 11/06/18 Unofficial Markscheme Eduqas Biology A Level 2019 Paper 1,2,3 2019 Exam discussion AQA GCSE Coined Trilogy Biology 8464 - Paper 1 - 14th May 2019
KCSE Past Papers 2018 Chemistry Paper 1 - KNEC KCSE Online
Nov 01, 2018· 23. Explain why it is important to put off a non-luminous flame immediately after use. (2 marks) 24. (a) Name two ores of iron. (1 mark) (b) Describe how the amount of iron in a sample of iron(III) oxide can be determined. (2 marks) 25. Explain why a solution of sodium chloride conducts electricity while that of sugar does not. (2 marks) 26.