Zadanie 1b
Outline why solid tin(IV) iodide is classified as a polar covalent compound. Use sections 9 and 17 of the data booklet.
Position in the bonding triangle
Locate a binary compound on the van Arkel-Ketelaar bonding triangle from the average electronegativity and the electronegativity difference of its elements, and predict its bonding type and properties from that position.
Tę umiejętność sprawdza 8 zadań wzorowanych na arkuszach IB z lat 2023–2025.
Zadania sprawdzające tę umiejętność: 8 Otwórz w wyszukiwarce z filtrami
Zadanie 1c
A student proposed that, because tin(IV) iodide might be ionic, electrolysing the molten compound with inert electrodes should regenerate tin and iodine. (i) Label the diagram of the electrolytic cell to show which electrode is the anode and which is the…
- Materiał graficzny
Zadanie 1b
4.81 g of sulfur was heated in a stream of chlorine gas until the reaction was complete. The mass of the chloride produced was 10.13 g. (i) Calculate how many atoms are present in this 4.81 g sample of sulfur. Use sections 2 and 7 of the data booklet. (ii)…
Zadanie 3c
When sodium burns in excess oxygen, the main product is sodium peroxide, Na2O2. Determine the percentage covalent character and the bonding type in sodium peroxide using sections 9 and 17 of the data booklet.
Zadanie 9
The table shows the average electronegativity and the electronegativity difference for four substances, each made from two elements. Which substance is an alloy? A. P B. Q C. R D. S
- Tabela do uzupełnienia
Zadanie 3a
Potassium bromide, KBr, forms a three-dimensional lattice of ions. (i) Demonstrate how the electronegativity values and bonding triangle in sections 9 and 17 of the data booklet support an ionic model for this solid. (ii) Outline the nature of the…
Zadanie 3a
Chromium(III) oxide, Cr2O3, is a hard ceramic used as an abrasive and as a wear-resistant coating. Outline the bonding in chromium(III) oxide and its electrical conductivity in the solid state. Use sections 9 and 17 of the data booklet.
Zadanie 3b
Beryllium metal is produced by the electrolysis of beryllium chloride, BeCl2, dissolved in molten sodium chloride. (i) Write the half-equation for the process at the electrode where beryllium metal is produced. (ii) Calculate the atom economy of this…