Originally published as 61 Tenn. For educational use only.
Preparation of insoluble salts - ionic precipitation Insoluble salts, e. Preparation of soluble salts 1. Volume of alkali added is measured. Next, the product is evaporated to dryness to obtain the salt. In general, the metal is added to the acid until there is no further reaction.
Then the mixture is filtered off to separate Zn from ZnSO4. The crystals then filtered and squeezed between filter papers to dry. By reacting metal oxide with acid Nearly all the metal oxides react with acids, but most require warming, This method is especially suitable for those metals which do not react with dilute acids.
The unreacted oxide is then removed by filtering. The filtrate is a blue solution of copper II sulphate. The crystals are obtained by concentrating the solution by evaporation, and then leaving it to cool.
The crystals formed can be removed by filtration. As copper II sulphate crystals contain water of crystallisation, it is important not to evaporate the solution to dryness. By Reacting Metal Carbonate with Acid Similar to that involving metal oxide and acid, but this time, no heat is required.
The carbonate fizzes and gives of carbon dioxide gas. Excess carbonate must be added to ensure that all the acid is neutralised The solution is then filtered to remove unreacted carbonate and evaporate to concentrate the solution for crystallisation E. Carbon dioxide can be tested by bubbling it into limewater which will turn limewater colourless to milky.
Properties and uses of Ammonia produced from nitrogen reacted with hydrogen For producing: The Haber Process The Process: Nitrogen and hydrogen are mixed together in ratio 1: Since the reaction is reversible so H2 and O2, reproduced from decomposition of produced NH3, are passed over the catalyst again to produce ammonia.
Conditions for Manufacturing Ammonia to have high yield of ammonia we should have: Higher pressure Lower temperature But in practice, we use lower pressure of atm and higher temperature of oC.
Using low temperature is too slow to reach equilibrium Using high pressure involves safety risk and higher cost Ammonia as fertilizers Plants need nitrogen as one of component for growth and ammonium fertilizers contain nitrogen for that.
Deduce, in terms of nitrogen content, which of these fertilizers best for plants. Problems with Ammonia Eutrophication is the increase in organic content of water when fertilizers leach into soil and washed into rivers and streams. When excess fertilizers washed away by rain, nitrate ions in it gets into rivers and helps aquatic plants like algae to grow swiftly.
When too much algae, water turns murky and sunlight would not penetrate into water to help their growth which in turn lead to deaths of algae. Decay of this organic matter uses up oxygen, hence killing aquatic animals. Then even more algae dies and even more animals die Water pollution results from runoff of fertilizer use, leaching from septic tanks, sewage and erosion of natural deposits.
Since groundwater is our drink source, when humans drink this water, they will get seriously ill and babies may suffer breathlessness to death MCQ Questions 1. Which of the following gases cannot be removed from the exhaust gases of a petrol powered car by its catalytic converter?
An excess of dilute sulphuric acid reacts with both aqueous barium hydroxide and aqueous barium chloride. In what way are the two reactions the same?A fact is something that is consistent with objective reality or that can be proven with heartoftexashop.com usual test for a statement of fact is verifiability — that is whether it can be demonstrated to correspond to heartoftexashop.comrd reference works are often used to check facts.
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Changes to legislation: Equality Act is up to date with all changes known to be in force on or before 27 September There are changes that may be brought into force at a future date. THE ROAD ACCIDENT FUND AND SERIOUS INJURIES: THE NARRATIVE TEST.
M Slabbert *. H J Edeling *. 1 Introduction. The Road Accident Fund Act 56 of has for many years been a bone of contention between lawyers, the government and physicians.
In general, lawyers want to get as much as they can from litigation 1 against the Road Accident Fund (RAF), 2 government wants to pay as little .
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Level (Units 1 and 2): Entry 2/Access 3 in Scotland / CEF A2. Level (Unit 3) the Worksheet 1a word list and Worksheet 1b .