Zadanie 5a
Calculate the pH of the potassium hydroxide solution.
Zapisujemy na Twoim urządzeniu to, bez czego serwis nie działa, np. zalogowanie. Plików analitycznych użyjemy tylko za Twoją zgodą. Szczegóły w polityce prywatności.
Baza zadań
Wybierz umiejętność, rok lub poziom trudności. Każde zadanie ma klucz i schemat punktowania.
Pokazujemy tylko poziomy, dla których mamy zadania.
Znaleziono 1061 zadań
Calculate the pH of the potassium hydroxide solution.
Write an equation for the reaction between ethanoic acid and potassium hydroxide.
A volume of 21.6 cm3 of KOH(aq) neutralized 25.0 cm3 of the ethanoic acid solution. Determine the concentration of the ethanoic acid.
How many neutrons and electrons are present in the ion ? A. 14 neutrons and 16 electrons B. 14 neutrons and 10 electrons C. 13 neutrons and 10 electrons D. 14 neutrons and 13 electrons
Hydrogen sulfide, H2S, is removed from natural gas in the Claus process. Part of the hydrogen sulfide is burned in air to form sulfur dioxide, which then reacts with the remaining hydrogen sulfide to form sulfur. (i) Determine the enthalpy change, in…
The enthalpy change of combustion of ethanol was investigated in a school laboratory. A spirit burner containing ethanol was used to heat water in a metal can. A total of 0.0250 mol of ethanol was burned. The following data were recorded. (i) Calculate the…
Glucose, C6H12O6, is oxidized in the body by respiration to carbon dioxide and water. The standard enthalpy of combustion of glucose is −2803 kJ mol−1. Determine the energy, in kJ, released by the complete oxidation of 12.5 g of glucose.
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:…
Suggest how the rate of this reaction could be determined experimentally.
Explain how a catalyst such as manganese(IV) oxide increases the rate of this reaction.