Zadanie 13
Which oxide will react with water to produce the most basic solution? A. Potassium oxide B. Calcium oxide C. Sulfur trioxide D. Nitrogen dioxide
Basic, amphoteric and acidic oxides
Describe the change from basic metal oxides through amphoteric oxides to acidic non-metal oxides across a period, and write equations for the reactions of group 1 and group 2 oxides, carbon dioxide and sulfur dioxide with water.
Tę umiejętność sprawdza 21 zadań wzorowanych na arkuszach IB z lat 2022–2026.
Zadania sprawdzające tę umiejętność: 21 Otwórz w wyszukiwarce z filtrami
Zadanie 13
The diagram shows an outline of the periodic table in which four elements of period 3 are labelled A, B, C and D. Which element forms an amphoteric oxide? A. Element A B. Element B C. Element C D. Element D
- Materiał graficzny
Zadanie 1a
Outline one reason why SO2 is considered a pollutant.
Zadanie 14
Which oxide reacts with water to give a solution with a pH greater than 7? A. SO2 B. P4O10 C. Al2O3 D. Na2O
Zadanie 2e
Atmospheric carbon dioxide and the pH of surface seawater were measured at a monitoring station over nineteen years. The graph shows the annual mean values. (i) Outline the relationship between the carbon dioxide mixing ratio and the pH of the seawater. (ii)…
- Materiał graficzny
Zadanie 3a
(i) State one environmental problem caused by acid rain. (ii) Write an equation for the reaction of sulfur trioxide, SO3, with water in the atmosphere, in which an acid forms.
Zadanie 3b
Potassium oxide, 0.0150 mol, was dissolved in water and the solution was made up to a final volume of 250.0 cm3. (i) Write a balanced equation for the reaction of potassium oxide with water. (ii) Calculate the pH of the solution.
Zadanie 5b
Element E forms the oxoanion EO43−. Two possible Lewis structures of the ion are shown, with lone pairs drawn as dots. (i) Use formal charges to show which of the two structures is the better representation of the ion. (ii) The oxide E4O10…
- Materiał graficzny
Zadanie 7
Equal amounts of each of the following oxides are added to separate samples of water of the same volume. Which oxide gives the solution with the lowest pH? A. CO B. SO3 C. K2O D. CO2
Zadanie 8
When the same amount of each oxide is added to an equal volume of water, which oxide produces the solution with the lowest pH? A. Li2O B. Al2O3 C. SO3 D. CO2
Zadanie 3e
Calcium reacts with water to form calcium hydroxide solution and hydrogen gas. Ca(s) + 2 H2O(l) → Ca(OH)2(aq) + H2(g) (i) Calculate the enthalpy change, in kJ, when 5.00 g of calcium reacts completely with water. Use section 13 of the data booklet.…
Zadanie 4b
Suggest why sulfur dioxide released into the atmosphere is an environmental concern.
Zadanie 9
Which period 3 oxide forms a solution with pH > 7 when it is added to water? A. Al2O3 B. Na2O C. SiO2 D. SO2
Zadanie 2d
Acid deposition forms when oxides of sulfur dissolve in water in the atmosphere. Write an equation for sulfur(VI) oxide reacting with water to produce an acid.
Zadanie 6a
Hydrogen sulfide, H2S, is removed from natural gas by burning it in air to form sulfur dioxide. (i) Determine the standard enthalpy change of reaction, ΔH⊖, in kJ mol−1, for 2 H2S(g) + 3 O2(g) → 2 SO2(g) + 2 H2O(l),…
- Tabela do uzupełnienia
Zadanie 6
Which sequence shows the oxides in order of increasing acidity? A. P4O10 < MgO < Al2O3 B. Al2O3 < P4O10 < MgO C. P4O10 < Al2O3 < MgO D. MgO < Al2O3 < P4O10
Zadanie 7
The unbalanced equation below shows an oxide of an element X reacting with water. + H2O → H2XO4 Which of these oxides could be the missing reactant? A. Na2O B. SO2 C. P4O10 D. SO3
Zadanie 1a
(i) Write a balanced equation for the reaction of calcium with oxygen to form calcium oxide. (ii) Calcium oxide is a basic oxide. Identify an element in period 3 that forms an amphoteric oxide.
Zadanie 6
Which oxides form an acidic solution when they react with water? I. sulfur trioxide II. phosphorus(V) oxide III. calcium oxide A. I and II only B. I and III only C. II and III only D. I, II and III
Zadanie 5b
Some of the sulfur dioxide released is oxidized in the atmosphere to sulfur trioxide, SO3. Write an equation that shows how sulfur trioxide produces acid rain.
Zadanie 5e
Coal-fired power stations release carbon dioxide and sulfur oxides. Discuss two different measures that could reduce the environmental impact of generating electricity from coal.