Br Kr Alkali metals form the first element of a period, with one outer electron, in any period from period 2 onwards.
State why it is good for the environment if industry finds ways to make products using high yield reactions and processes that waste as little energy as possible.
It reduces the waste of reactants. It reduces the cost of the process. Less energy will be needed to dispose of the waste Less natural resources will be used. List the factors that can affect the percentage yield of a reaction.
Some factors are as follows: The reaction may be reversible b. Some reactant may react to give unwanted products by some alternative reaction. Some of the reactant or product may be lost during mixing or left in the apparatus.
The reactants may not be pure. Some of the desired product may be lost during its separation from the reaction mixture. Ammonia gas, NH3, is made by heating the gases nitrogen and hydrogen under pressure in the presence of an iron catalyst: According to the balanced chemical equation, 1 moles of N2 gives 2 moles of ammonia.
So, 28 g of nitrogen forms 34 g of ammonia. This is a thermal decomposition reaction in which water vapour and carbon dioxide are also products of the reaction. A student started with Write a balanced symbol equation for the thermal decomposition.
Calculate the percentage yield the student obtained.
So g of sodium bicarbonate gives of sodium carbonate. But the sodium carbonate produced is 9.2Na(s)+F2(g)=2NaF(l?)+boom! And yellow flames (l?) perhaps liquid due to the extreme heat released by the reaction, as a alkali metal halogen salt it would be ionic, have a high melting point but fluorine can burn concrete, so the heat of said reaction would be extreme.
Unit VI Stoichiometry. Lesson Day Date Topic Worksheet. 1. Stoichiometry 1. This page contains easy notes on New () GCSE AQA Chemistry C1 Atomic Structure along with textbook kerboodle answers, videos and past paper questions for revision and understanding of the topic Atomic structure.
This is the complete revision pack for New . A chemical equation is balanced when the same number of each kind of atom appears in the reactants and in the products Which reaction can be predicted from the activity series? Chemistry notes on the physical properties of lithium, sodium, potassium, rubidium, caesium (cesium) and francium, The chemical properties, chemical reactions with water, oxygen and chlorine - word equations & balanced equations and uses of the elements and compounds of the Group 1 Alkali Metals of the Periodic Table e.g.
lithium, sodium & potassium etc. Write a balanced chemical equation with state symbols for the following reactions.
(i) Solutions of barium chloride and sodium sulphate in water react to give insoluble barium sulphate and the .