Concentration Calculations Flashcards
Quantitative Chemistry (10 cards)
What are titrations used for?
Experiments that let you find the volumes needed for two solutions to react together completely.
How can you find the concentration of an unknown solution using titration?
Use the volumes from the titration experiment and the reaction equation.
What is the formula for calculating concentration in mol/dm3?
Number of moles = Concentration x volume.
What is the balanced symbol equation for the reaction between sodium hydroxide and sulfuric acid?
2NaOH + H2SO4 -> Na2SO4 + 2H2O.
How do you calculate the number of moles of sodium hydroxide?
Number of moles = concentration x volume.
What is the formula for calculating the concentration of the unknown substance?
Concentration = number of moles / volume in dm3.
Why is it important to consider measurement uncertainty in titration experiments?
Measurements have some uncertainty and averaging repeated measurements provides more reliable results.
What is the first step to convert concentration from mol/dm3 to g/dm3?
Find the concentration in mol/dm3.
What is the equation for converting moles to grams?
Mass = moles x Mr
What is the relative formula mass of sulfuric acid (H2SO4)?
98 g/mol.
