Chemical Solutions and Reactions

The video tutorial covers an experiment involving hydrochloric acid and NaOH, where the total volume and temperature change are measured. It explains how to calculate the energy produced using the mass of water, specific heat capacity, and temperature change. The tutorial also covers calculating moles and enthalpy change, and discusses a reaction between copper sulfate and magnesium, focusing on determining the excess reactant and calculating the enthalpy change.

What is the total volume of the solution after mixing hydrochloric acid and sodium hydroxide?

• 50 cm³

• 200 cm³

• 150 cm³

• 100 cm³

What is the specific heat capacity of water used in the energy calculation?

• 5.0 J/g°C

• 4.8 J/g°C

• 4.2 J/g°C

• 4.1 J/g°C

How is energy converted from joules to kilojoules?

• Multiply by 1000

• Divide by 1000

• Multiply by 10

• Divide by 10

What is the concentration of hydrochloric acid used in the moles calculation?

• 2.0 M

• 1.5 M

• 1.0 M

• 0.5 M

What is the formula to calculate moles of a solution?

• Concentration x Volume / 1000

• Volume / Concentration

• Mass / Volume

• Concentration x Volume

What was the temperature change observed in the copper sulfate and magnesium reaction?

• 30.0°C

• 25.1°C

• 21.5°C

• 6.8°C

What is the specific heat capacity of water used in the second experiment?

• 4.2 J/g°C

• 4.1 J/g°C

• 4.8 J/g°C

• 5.0 J/g°C

Which reactant was in excess in the copper sulfate and magnesium reaction?

• Both were equal

• Copper sulfate

• Neither was in excess

• Magnesium

What is the final enthalpy change for the copper sulfate and magnesium reaction?

• 2856 kJ/mol

• 57.12 kJ/mol

• 524.6 kJ/mol

• 10.492 kJ/mol

What sign is used to indicate an exothermic reaction?

• Minus

• Equal

• Multiply

• Plus