Zadanie 1c
The final step can be summarized as: 3 NO2(g) + H2O(l) → 2 HNO3(aq) + NO(g) ΔH⊖ = −138 kJ mol−1 Describe the types of bonding found in the concentrated aqueous nitric acid product.
Ionic bonding and formulas of ionic compounds
Describe the ionic bond as electrostatic attraction between oppositely charged ions, and write the formula and name of an ionic compound from its ions, including polyatomic ions such as ammonium, hydroxide, nitrate, carbonate, sulfate and phosphate.
Tę umiejętność sprawdza 19 zadań wzorowanych na arkuszach IB z lat 2022–2026.
Zadania sprawdzające tę umiejętność: 19 Otwórz w wyszukiwarce z filtrami
Zadanie 1a
(i) Magnesium burns in oxygen according to the equation . Explain, using electron configurations, how ions are formed by magnesium and oxygen and how these ions form a compound. (ii) Explain, using electron configurations, why…
Zadanie 6
What is the correct formula of calcium phosphide? A. Ca3P2 B. Ca2P3 C. CaPO4 D. Ca3(PO4)2
Zadanie 6
Which compounds contain ionic bonds? I. SiO2 II. CH3COONa III. MgO A. I and II only B. I and III only C. II and III only D. I, II and III
Zadanie 2b
Gallium forms a sulfate of formula Ga2(SO4)3. (i) Both ionic and covalent bonding are present in this compound. State which particles are held together by each type of bond. (ii) Contrast covalent and ionic bonds in terms of what happens to the valence…
Zadanie 4b
Both ionic and covalent bonding are present in sodium ethanedioate, Na2C2O4. (i) Describe the two types of bonding. Ionic bonding: Covalent bonding: (ii) Deduce a Lewis formula of the ethanedioate ion, C2O42−. (iii) State the geometry of the…
Zadanie 6
Calcium ions and phosphate(V) ions combine to form an ionic compound. What is its formula? A. CaPO4 B. Ca2(PO4)3 C. Ca3(PO4)2 D. Ca3(PO3)2
Zadanie 7
Which row shows the correct formula of aluminium sulfide and the electron configuration of each species in it? A. Al3S2; Al species [Ne]; S species [Ar] B. Al2S3; Al species [Ne] 3s2 3p1; S species [Ne] 3s2 3p4 C. Al2S3; Al…
Zadanie 10
Which of these compounds has the weakest ionic bond? A. SrO B. BaO C. SrS D. BaS
Zadanie 2b
(i) For the carbonate ion, draw its Lewis formula. (ii) Write the chemical formula of ammonium carbonate.
Zadanie 6
Part of the lattice of potassium bromide, KBr, is shown in an expanded view. Which statement about the lattice of potassium bromide is correct? A. Each bromide ion is in contact with six potassium ions. B. Neighbouring ions are held together by shared pairs of…
- Materiał graficzny
Zadanie 12
In which compound is the electrostatic attraction between the ions weakest? A. MgO B. CaO C. CaS D. MgS
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 6b
Chromium is a first-row transition element. (i) Deduce the nuclear symbol, ZAX, of the chromium-52 ion that contains 21 electrons. (ii) Chromium(II) chloride, CrCl2, melts at 824 °C. Explain how the ions are held together in solid…
Zadanie 9
What is the correct formula for ammonium sulfate? A. (NH4)2SO4 B. NH4SO4 C. NH4(SO4)2 D. (NH3)2SO4
Zadanie 22
What is the formula of iron(III) sulfide? A. FeS B. Fe3S2 C. Fe2(SO4)3 D. Fe2S3
Zadanie 10
The formula of yttrium sulfate is Y2(SO4)3. What is the formula of yttrium nitrate? A. YNO3 B. Y(NO3)2 C. Y2(NO3)3 D. Y(NO3)3
Zadanie 9
A compound consists of Al3+ and SO42− ions. What are the name and formula of the compound? A. Aluminium sulfite, Al2(SO3)3 B. Aluminium sulfate, Al3(SO4)2 C. Aluminium sulfide, Al2S3 D. Aluminium sulfate, Al2(SO4)3
Zadanie 11
What is the name of the compound with the formula Cr2(SO4)3? A. Chromium sulfate B. Chromium(II) sulfate C. Chromium(III) sulfate D. Chromium(VI) sulfate