Write balanced chemical and ionic equations when reactants and products are specified, using state symbols and the smallest whole-number coefficients, and interpret the coefficients as mole ratios.
Tę umiejętność sprawdza 18 zadań wzorowanych na arkuszach IB z lat 2022–2026.
Sodium reacts vigorously with water. (i) Write an equation, with state symbols, for the reaction of sodium with water. (ii) Describe one observation from the reaction in (i). (iii) Sketch, on the axes below, an energy profile for this reaction. Label the…
Aluminium sulfate reacts with barium chloride solution to form a precipitate of barium sulfate and an aqueous solution of aluminium chloride. Al2(SO4)3(aq) + BaCl2(aq) → AlCl3(aq) + BaSO4(s) What is the ratio of the coefficients of barium chloride to…
(i) Suggest, giving a reason for each, two different safety precautions that should be taken when carrying out either of these preparations. (ii) Deduce the coefficients needed to balance the following equation for the reaction of silver with concentrated…
(i) Write a balanced equation, with state symbols, for this reaction. (ii) Deduce which of the two reactants runs out first, that is, which one limits the reaction. Use sections 1, 4 and 7 of the data booklet. (iii) Calculate the volume, in dm3,…
In the atmosphere, nitrogen dioxide combines with rain water and oxygen to give nitric acid. State the equation for this reaction, including state symbols.
What is the coefficient of oxygen when the equation for the complete combustion of butan-1-ol is balanced using the smallest whole numbers? The unbalanced equation is C4H9OH + O2 → CO2 + H2O. A. 4 B. 6 C. 7 D. 13
In the Claus process, used to recover sulfur from refinery gases, sulfur dioxide reacts with hydrogen sulfide, H2S, to form sulfur. (i) State the oxidation state of sulfur in SO2 and in the sulfur produced. (ii) Deduce the balanced equation for…
When the equation for the complete combustion of 1 mol of pentan-1-ol, C5H11OH, is balanced, what is the sum of all the coefficients? Unbalanced equation: C5H11OH(l) + O2(g) → CO2(g) + H2O(l) A. 19 B. 19.5 C. 20 D. 39
Bathers release nitrogen-containing compounds, including ammonia, into the pool water. Ammonia reacts with hypochlorous acid to form chloramines. (i) Deduce an equation for the reaction of ammonia with hypochlorous acid that forms trichloramine,…
Complete combustion turns pentadecane entirely into carbon dioxide and water. Write the corresponding balanced equation.
Antimony(III) sulfide burns in air to form antimony(III) oxide and sulfur dioxide. Sb2S3(s) + O2(g) → Sb2O3(s) + SO2(g) The equation is balanced using the smallest whole-number coefficients. What is the sum of all the coefficients? A. 8 B. 15 C. 19 D.…
Sucrose, C12H22O11, and the triglyceride glyceryl tripalmitate, C51H98O6, can both be completely oxidized in the body to carbon dioxide and water. Write balanced equations for the complete oxidation of each compound. C12H22O11:…
Ethane burns completely in oxygen to give carbon dioxide and water. C2H6(g) + O2(g) → CO2(g) + H2O(l) What is the C2H6 : O2 mole ratio in the balanced equation, written with the smallest whole-number coefficients? A. 1:3 B. 2:5 C. 2:7 D.…
Liquid octane burns completely in oxygen to give carbon dioxide and liquid water. C8H18(l) + O2(g) → CO2(g) + H2O(l) What is the C8H18 : O2 ratio when the equation is balanced using the smallest whole-number coefficients? A. 1 : 12 B. 1 :…
(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.
Determine the coefficients needed to balance the equation for the reaction between sodium and water. Na(s) + H2O(l) → NaOH(aq) + H2(g)
Nitrogen dioxide reacts with fluorine as shown below. 2 NO2(g) + F2(g) → 2 NO2F(g) rate = k[NO2][F2] How does the rate of disappearance of NO2 compare with that of F2? A. NO2 disappears at half the rate of…
A solution of barium hydroxide of concentration 0.10 mol dm−3 was added dropwise to 25 cm3 of copper(II) sulfate solution of concentration 0.10 mol dm−3 until 25 cm3 of the barium hydroxide solution had…
Zapisujemy na Twoim urządzeniu to, bez czego serwis nie działa, np. zalogowanie. Plików analitycznych użyjemy tylko za Twoją zgodą. Szczegóły w polityce prywatności.