Separate chemistry 1 Study Guide

Titration calculations let you determine an unknown concentration or volume of a solution by reacting it with a solution of known concentration. The titration continues until a reaction endpoint is reached, often indicated by a colour change. You use the balanced chemical equation to find the mole ratio between reactants. First, calculate the number of moles of the known solution using moles = concentration × volume (in dm³). Apply the mole ratio from the equation to determine the moles of the unknown. Then use the appropriate rearranged formula to solve for the unknown concentration or volume, making sure all volumes are in dm³. Accurate unit conversion and attention to stoichiometry are essential for correctness.

Transition metals are a unique group of metallic elements found in the central block of the periodic table. They are renowned for their distinct properties, which set them apart from other metals like those in Group 1 or Group 2. Most metals that we typically encounter in everyday life, from iron in construction to copper in wiring, are in fact transition metals. Their characteristic features include having high melting points and high densities, making them robust materials. A particularly striking property is their ability to form brightly coloured compounds, which gives rise to many vibrant pigments. Furthermore, transition metals and their compounds often act as catalysts, speeding up chemical reactions without being consumed themselves, as exemplified by iron in the Haber process.