-
Concentration and dilution play vital roles in everyday life, from fine-tuning the strength of your morning coffee to ensuring the correct potency of medications. When mixing paints, artists rely on these concepts to achieve the perfect hue, while in the kitchen, chefs adjust the concentration of flavours to create culinary...
-
Can you confidently identify acids and bases? What about their conjugates? Test yourself with this quiz. Your turn – acids, bases and salts For questions 1–5, identify the chemical species as a Brønsted–Lowry acid or base: \(\ce{HClO4}\) \(\ce{HCOOH}\) \(\ce{CN}^{-}\) \(\ce{SO}_{3}^{2-}\) \(\ce{H2S}\) For questions 6–10, write the chemical formulas for each...
-
If you are handling solutions, being able to complete calculations related to concentrations and dilutions is critical. Test your ability to do these with a quiz. Your turn – concentration and dilutions Determine the volume (in \(\textrm{mL}\)) of ethanol required to prepare \(80\textrm{ mL}\) of a \(70.0\%(v/v)\) solution. A solution...
-
Redox reactions, which involve the transfer of electrons between substances, are fundamental to understanding processes like combustion, respiration, and corrosion. Test your understanding of redox reactions with a quiz. Your turn – redox reactions For questions 1—10, determine the oxidation numbers for the elements indicated. \(\ce{F}\) in \(\ce{F}_{2}\) \(\ce{Ca}\) in...
-
Have you mastered calculating reactants and products? Put your stoichiometry skills to the test with a quiz. Your turn – stoichiometry calculations \(\ce{CO}\) reacts with \(\ce{O}_{2}\) to form \(\ce{CO}_{2}\) gas as shown by the equation: \[2\ce{CO}+\ce{O}_{2}\rightarrow2\ce{CO}_{2}\] Calculate the amount in moles of \(\ce{O2}\) required to react with \(0.58\textrm{ mol}\) of...
-
Understanding the strength of acids and bases is crucial for predicting their behaviour in chemical reactions and their impact in various applications. Test your ability to identify and differentiate between strong and weak acids and bases with this quiz. Your turn – strength of acids and bases The \(\ce{HBr}\) in...
-
The ability to complete calculations using moles is very important in chemistry. Test yourself with a quiz. Your turn – mole calculations Aspirin has the formula \(\ce{C}_{9}\ce{H}_{8}\ce{O}_{4}\). Calculate the mass of aspirin in grams present in \(0.650\textrm{ mol}\) of aspirin. The molar masses of \(\ce{C}\), \(\ce{H}\) and \(\ce{O}\) are \(12.01\textrm{...
