CHAPTER 12
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| show | Calcium hydroxide, Ca(OH)2
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| Acid rain is formed when sulfur dioxide and oxides of nitrogen dissolve in rain water. Which problem is not caused by acid rain? | show 🗑
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| show | True
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| True or false; Acid rain contains sulfur dioxide which is formed when sulfur compounds burn in the air | show 🗑
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| Sulfur is a common starting material for the Contact process. Name a source of sulfur | show 🗑
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| Describe step 2, giving reaction conditions and a chemical equation. Reference to reaction rate and yield is not required | show 🗑
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| show | Bubbles
Dissolves
Blue solution
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| Dilute sulfuric acid is a typical acid. A student adds excess dilute sulfuric acid to a sample of solid copper(II) carbonate in a test-tube. Give the names of all products formed | show 🗑
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| Concentrated sulfuric acid has different properties to dilute sulfuric acid. When concentrated sulfuric acid is added to glucose, C6H12O6, steam is given off and a black solid is formed. What type of reaction has occurred? | show 🗑
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| Sulfuric acid is made by the Contact process. Sulfur is burned by spraying droplets of molten sulfur into air. Suggest and explain two advantages of using this method. | show 🗑
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| Sulfur dioxide is more expensive than air. What is the three advantage of using an excess of air? | show 🗑
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| show | Moves equilibrium to left;
Forward reaction exothermic;
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| The forward reaction is exothermic. The reaction is usually carried out at a temperature between 400 and 450 °C. (ii) What is the four effect on the rate of using a temperature below 400 Degrees C? Explain your answer. | show 🗑
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| A low pressure, 2 atmospheres, is used. At equilibrium, about 98% SO3 is present. What is the effect on the position of equilibrium of using a higher pressure? | show 🗑
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| show | High yield at 2 atm;
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| Name the catalyst used in the Contact process | show 🗑
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| Describe in three points how concentrated sulfuric acid is made from sulfur trioxide | show 🗑
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| show | Bleach
Making wood pulp
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| One source of sulfur dioxide is burning sulfur in air. Describe how sulfur dioxide can be made from the ore zinc sulfide | show 🗑
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| show | Faster reaction rate
More collisions per second
Higher collision frequency fewer moles
Molecules (of gas) on right
Position of equilibrium shifts right
Yield increases
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| show | The reaction is too violent and too exothermic
Produces mist and fumes of acid
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| Sulfuric acid is an important acid, both in the laboratory and in industry. Its manufactured in the Contact Process. it was made by heating metal sulfates and by burning a mixture of sulfur and potassium nitrate. Give a major use of sulfuric acid. | show 🗑
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| When the iron(II) sulfate is heated strongly, further decomposition occurs. 2FeSO4(s) - Fe2O3(s) + SO2(g) + SO3(g) The gases formed in this reaction react with water and oxygen to form sulfuric acid. Explain how the sulfuric acid is formed. | show 🗑
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| When a mixture of sulfur and potassium nitrate is burned and the products are dissolved in water, sulfuric acid is formed. The sulfuric acid formed by this method is not pure. It contains another acid. Deduce the identity of this acid. | show 🗑
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| show | 2KNO3 = 2KNO2 + O2
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| Sulfuric andHexanesulfonic acidis a strong acid. It has similar properties to sulfuric acid. Sulfonic acids are made from alkanes and oleum, H2S2O7. C6H14 + H2S2O7 C6H13SO3H + H2SO4 Describe how oleum is made from sulfur by the Contact process. | show 🗑
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| show | Add oleum to water
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| show | Measure rate with named reactive metal, Mg, Zn
Both fast reactions
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| show |
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| Explain the terms strong acid | show 🗑
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| Explain the terms weak acid | show 🗑
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| The food additive E220 is sulfur dioxide. It is a preservative for a variety of foods and drinks. State two other uses of sulfur dioxide. | show 🗑
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| show | Burn or heat or react sulfur;
In air oxygen
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| Sulfur dioxide is a reductant (reducing agent). Describe what you would see when aqueous sulfur dioxide is added to acidified potassium manganate(VII). | show 🗑
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| Zinc blende is heated in air. Zinc oxide and sulfur dioxide are formed. Write the balanced equation for this reaction | show 🗑
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| show | Two reagents from named metal(s) more reactive to form zinc orcarbon monoxide
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| show | Burns to form sulfur dioxide
Acid rain
Any problem associated with acid rain
Sulfur dioxide is poisonous
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| Sulfur dioxide is made by spraying molten sulfur into air. The sulfur ignites and sulfur dioxide is formed. Suggest why molten sulfur is used in the form of a fine spray | show 🗑
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| show | Kills bacteria.
Anti-oxidant
Stops oxygen oxidising juice
Prevents growth of bacteria
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| show | Bleach
Refrigerant
Making wine
Fumigant
Insecticide
Dyes
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| Describe how sulfur dioxide is changed into sulfur trioxide. Give the reaction conditions and an equation | show 🗑
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| show | It kills bacteria
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| show | Its been used as a bleach
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| Define the term acid | show 🗑
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| Suggest an explanation why sulfurous acid in contact with air changes into sulfuric acid. | show 🗑
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| show | Its been used as a bleach
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| How does Sulphur dioxide preserve food? | show 🗑
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| show | Bubble into (conc) sulphuric acid
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| Explain, mentioning both rate and percentage yield, why the temperature used in the Contact process is 450°C | show 🗑
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Created by:
Haridus Academy