8. What volume of hydrogen gas is produced if 2.50 g of magnesium metal is dissolved in excess hydrochloric acid in a fumehood with a temperature of 25 °C and a pressure of 1 bar (100 kPa)? Ca + Cl 2 → CaCl 2. These compounds are usually ionic in nature. To know the reaction between group 2 metal oxides and water **2. REACTIONS OF THE GROUP 2 ELEMENTS WITH COMMON ACIDS This page looks at the reactions of the Group 2 elements - beryllium, magnesium, calcium, strontium and barium - with common acids. Reaction with acids. Reactions with dilute hydrochloric acid All the metals react with dilute hydrochloric acid to give bubbles of hydrogen and a colourless solution of the metal chloride. Investigate reactions between acids and bases; use indicators and the pH scale; Leaving Certificate. They react violently in pure oxygen producing a white ionic oxide. Mg ribbon will often have a thin layer of magnesium oxide on it formed by reaction with oxygen. Learner Activities10 The rest of Group II metals react with increasing vigorous going down the Group When zinc metal reacts with oxygen gas, {eq}2Zn(s) + O_2(g) \to 2ZnO(g) {/eq}, large amounts of light and heat are released. This property is known as deliquescence. Science. Part of. Ba(s) + O 2 (g) BaO 2 (s) The more active members of Group IIA (Ca, Sr, and Ba) react with water at room temperature. B. You may remember that it is difficult to pick out any trends in reactivity in the elements, but there are trends that you can pick out. ... State and explain the trend in melting points of the elements down Group II from Mg to Ba. Teacher instructions4. When these metals (M) are heated in oxygen they burn vigorously to produce a white ionic oxide, M2+O2-. Mg burns with a bright white flame. The Hydrogen is +1 in the OH-ion and HCl, and +1 in water. Barium, a group 2 element, forms an ionic compound with sulfur, ... An acid contains the elements hydrogen, oxygen, and chlorine and has a molecular weight of 52.46 g/mol. Test yourself questions - Answers8. 2 Mg(s) + O 2 (g) 2 MgO(s) Calcium, strontium, and barium can also form peroxides. The Chemistry of Group 2. reacts with water. metal oxides + water Note: You will find the reason why lithium forms a nitride on the page about reactions of Group 2 elements with air or oxygen.You will find what you want about 3/4 of the way down that page. The elements of Group 2 are beryllium, magnesium, calcium, strontium, barium, and radioactive radium. The Group 1 elements, also known as the alkali metals, all react vigorously with water to produce an alkaline solution. Ca + 1/2O 2 → CaO Mg + 1/2O 2 → MgO. with acid to produce hydrogen gas and the corresponding halide salt. Activity 1: – Reactions and properties of Group 2 elements - Answers4. The group 2 metals will burn in oxygen. Systems and interactions. Reaction with halogens. The products of these reactions are what we might expect. Group 2 elements generally react to form compounds in which the group 2 element has an oxidation state of +2, beryllium will also do this but it has a tendency to form covalent rather than ionic compounds. All Group II elements react with acid to give hydrogen gas and the corresponding salt; M(s) + H⁺(aq) → M²⁺(aq or s) + H2(g) ; where M = A Group II element. 3. know the reactions of the elements Mg to Ba in Group 2 with oxygen, chlorine and water; OCR Chemistry A. Module 3: Periodic table and energy. **By the end of this lesson students should be able to: **1. The general electronic configuration of these elements is ns 1 and ns 2 respectively. It explains why it is difficult to observe many tidy patterns. Chemical world. Alkaline earth metals also react with oxygen, though not as rapidly as Group 1 metals; these reactions also require heating. It also deals very briefly with the reactions of the elements with chlorine. 3.1 The periodic table. All Group 2 elements tarnish in air to form a coating of the metal oxide. Examples: M 2 O 3, MO 2, ThO 2. eg. reactions of the group 2 elements with air or oxygen This page looks at the reactions of the Group 2 elements - beryllium, magnesium, calcium, strontium and barium - with air or oxygen. This is an A2 Chemistry PowerPoint Presentation on period 3 elements – reactions with oxygen. Na 2 O + H 2 O → 2NaOH. They have a low enthalpy of ionization and high electropositive character, the alkaline earth metals have a strong tendency to lose valence electrons. Reaction with sulphur. Activity 2 – Thermal stability of Group 2 carbonates - Answers5. 1. Magnesium is group 2, iron is group 8 and copper is group 11. REACTIONS OF THE GROUP 2 ELEMENTS WITH AIR OR OXYGEN This page looks at the reactions of the Group 2 elements - beryllium, magnesium, calcium, strontium and barium - with air or oxygen. The Group II elements are powerful reducing agents. Chemistry. Group 1, 2 and lanthanides form basic compounds of oxygen when they react with dioxygen. All group 2 elements will react with oxygen to produce a metal oxide-Mg would need to be heated but Barium will react at room temp. In these two lessons we show how Group II metals burn in oxygen and how the metal oxides formed react with water. These elements are divided into two categories i.e, alkali metals or group 1 elements and alkaline earth metals or group 2 elements. This is important as elements in the same group will react similarly. (i) The Reactions of Group 2 Elements with Oxygen. Which chemical reactions are likely to have an element as one of its products? The Facts The reactions with oxygen Formation of simple oxides This page mainly looks at the reactions of the Group 1 elements (lithium, sodium, potassium, rubidium and caesium) with oxygen - including the simple reactions of the various kinds of oxides formed. (3) Both group 1 and group 2 elements produce white ionic compounds. Again, if you have been working through this section of the syllabus in order, you will already have read the first bit of the page Reactions of the Group 2 elements with oxygen. Junior Cycle. It also deals very briefly with the reactions of the elements with chlorine. There is a diagonal relationship between lithium and magnesium. During the formation of these compounds, a large amount of energy is released. Beryllium reacts slowly with acids and has no reaction at room temperature. Lithium's reactions are often rather like those of the Group 2 metals. Redox reactions of Group 2 metals (a) describe the redox reactions of the Group 2 elements Mg - Ba: (i) with oxygen, Group 2 elements react vigorously with oxygen. Oxides of all Period 3 elements except Cl and Ar could be made on the same method: burning the element in the air in a combustion reaction when the element will react with the oxygen in the air to produce the oxide of the element. In these reactions, the elements that react with oxygen are all metals . Mg + H2O ---> Mg(OH)2 + H2. e.g. x This means that what ever they react with must gain electrons. Chemical properties. It explains why it is difficult to observe many tidy patterns. Reaction of iodine with air. To onstruct half equations of redox reactions of group 2 elements with oxygen, water and dilute acids and to identify what species have been oxidised and reduced using oxidation numbers. Lesson 2: Group 2 Compounds. Iodine, I 2 is not reactive towards with oxygen, O 2, or nitrogen, N 2.However, iodine does react with ozone, O 3, the second allotrope of oxygen, to form the unstable yellow I 4 O 9, the nature of which is perhaps I(IO 3) 3.. 1.3.2 (a) Redox Reactions of Group 2 Metals. M (s)----> M 2+ (aq) + 2e- MgO + 2HCl MgCl 2 + H 2O Reactions with oxygen. Email info@curriculum-press.co.uk Phone 01952 271 318 Resources The group 2 consists of the elements beryllium(Be), magnesium(mg), calcium(Ca), strontium(Sr), barium(Ba) and radium(Ra). These compounds readily react with water except a few exceptions. As group 2 in the periodic table comprises of metals, the reactivity of group 2 elements towards chlorine increases when working our way down the group 2 metals. Because they are not as active as the alkali metals, most of these elements form oxides. 2Mg + O 2MgO Mg will also react with warm water, giving a different magnesium hydroxide product. 2M(s) + O Group 2 reactions Reactivity of group 2 metals increases down the group Mg will also react slowly with oxygen without a flame. In reactions of elements with the oxygen, we get products –oxides. 3.1.2 (d, e) Reaction of Group 2 Oxides with Water and Group 2 compounds as Bases. 8 The Alkaline Earth Metals (Group 2) The alkaline earth metals react (quite violently!) M = Mg, Ca, Sr,Ba --> I will be using 'M' as the general symbol for a Group II element in this topic. Since the alkali metals are the most electropositive (the least electronegative) of elements, they react with a great variety of nonmetals. 2.11.3 investigate and describe the reactions of the elements with oxygen, water and dilute acids; Republic of Ireland. 2Mg + O2 2MgO This needs to be cleaned off by emery paper before doing reactions with Mg ribbon. Reactivity of Group 2 elements: x Group 2 metals are reactive: M Æ M 2+ + 2e-x These elements give away 2 electrons when they react. Reaction with oxygen. Activity 3 – The reactions of Group 2 elements - Answers6. Topic 4A: The elements of Groups 1 and 2. The Oxygen is -2 in the OH-ion, and -2 in water. A redox reaction occurs where an ionic oxide is produced with the formula MO (where M is the group 2 metal) eg– 2Ca(s) + O2(g) ----> 2CaO(s) Exposed to air, it will absorb water vapour from the air, forming a solution. This is compared to non-metals when the reactivity decreases working down a non-metal group such as group 7. Their oxides and hydroxides are alkaline in nature. Mg + 2 H2O Mg(OH) 2 + H2 This is a much slower reaction than the reaction with steam and there is no flame. Group 2: Group 2 elements are known as alkaline earth metals. Ba + H2O ---> Ba(OH)2 + H2. 2Sr (s) + O2 (g) ----> 2SrO (s) solubility of group 2 hydroxides increase down the group. Reactions of alkali metals with oxygen. Acidic oxide: As I said earlier, they are powerful reducing agents. 2.11 Group II elements and their compounds. This page mainly looks at the reactions of the Group 1 elements (lithium, sodium, potassium, rubidium and caesium) with oxygen - including the simple reactions of the various kinds of oxides formed. The reaction with oxygen. In this video I take a look at some of the different ways in which group 2 elements can react. Reaction of iodine with water. You will find this discussed on the page about electronegativity. Anhydrous calcium chloride is a hygroscopic substance that is used as a desiccant. 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