Given the following ionization/dissociation of hypothetical acids and bases in water:
The molar heat of combustion of ethanol is 1367 kJ mol-1. A 2.510 g sample of ethanol was combusted in heating a certain mass of water from 25oC to 45oC. 80% of the heat released was absorbed by the water. What was the quantity of water heated?
20 mL of 0.08 mol L–1 HCl is mixed with 30 mL of a 0.05 mol L–1 NaOH. What is the pH of the resultant solution ?
In order to determine the relative activity of four metals, each metal was placed in the salt solutions of the other metals and observed for signs of a reaction. The results are displayed in
A sample was tested for its approximate pH using several indicators. The results are given in the table.
Which of the following changes will always shift equilibrium to the left ?
How many structural isomers can the compound with the molecular formula, C2H3Cl2F have?
The concentration of chloride ion in river water was determined by titration with AgNO3 solution using a suitable indicator. 25.00 mL samples of river water were titrated with 1.034 x 10–2 mol L–1 AgNO3. The average titre was 22.60 mL. What is the concentration of the chloride ion in the river water?
What are the volumes in litres of 1 mole of helium gas and 1 mole of nitrogen gas respectively at 25 oC and 100 kPa ?
What is the correct burette reading in mL?
The half-equations for the vanadium redox cell are given below.
Which of the following would be a possible industrial source of sulfur dioxide?
What is the IUPAC name of the following compound ?
Which of the following is a Bronsted- Lowry acid – base reaction?
What is the systematic name of the following compound?