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16 Cards in this Set
- Front
- Back
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Explain what is meant by the term salt |
-When the H+ in an acid is replaced by a metal ions. |
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Why is ammonia acting as a base in this neutralisation? |
accepts a proton |
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What is the relative formula mass of (NH4)2 SO4 |
132.1 |
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ju09 Describe what you would see when magnesium reacts with an excess of sulphuric acid. |
-Mg/solid dissolves -Bubbles /gas produced |
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ju09 Explain, with the aid of a labelled diagram, what is meant by the term metallic bonding. ju09 Sodium, Na, is a metallic element. Explain, with aid of a labelled diagram with is meant by the term metallic bonding. |
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The student prepares a solution of calcium nitrate by reacting dilute nitric acid, HNO3, with the base calcium hydroxide, Ca(OH)2.
Why is calcium nitrate an example of a salt? |
The H+ ion in an (nitric) acid has been replaced by a metal ion OR by a Ca2+ ion.
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Why can ammonium sulfate be described as a salt? |
H+ ions in sulfuric acid are replaced with ammonia ions. |
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Predict the H-N-H bond angle in a hydrazine molecule. (H2N-NH2) |
-Predicted bond angle 107º -Explanation:There are 3 bonded pairs and 1 lone pair -Electron pairs repel -Lone pairs repel more than bonded pair |
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Write the formula of the negative ion that is formed when hydrazine reacts with water |
OH- |
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What is the name for NAClO? |
Sodium chlorate (1) |
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Aluminium nitrate (V) can be made by reacting a base with an acid. For this reaction, name a suitable base and the formula of acid? |
Name of base: Aluminium oxide formula of the acid: nitric acid |
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SrCl2= dilute hydrochloric acid to strontium carbonate. Observations= Equations= |
-Effervescence OR fizzing -Strontium carbonate OR soliddissolves -SrCO3 + 2HCl = SrCl2 + H2O + CO2 |
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Predict a value for the pH of the resulting solution |
Any value or the range 7 < pH≤ 14 |
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Give the formual of the negative ion reponisble for the conductivity of the solution formed |
OH– |
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Heartburn is a form of indigestion caused by an excess of stomach acid. state a compund of magnesium that could be used to treat heartburn |
magnesium oxide |
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Student makes a solution of Strontium Chloride by adding chlorine water to aqueous strontium bromide. Observations? |
The mixture turns yellow |
