This experiment gets students to compare pH titration data collected using different indicators. It shows the importance of choosing the correct indicator. The experiment(s) are easily carried out in 50 minutes and students can do up to 8 titrations during the class. Data is reported back to the teacher and the results shared with the wider class. Student feedback suggests this is a very useful practical and the repetitive nature of the experiment allows them to fine-tune their experimental skills. The practical will be useful for those studying acid-base chemistry and buffer systems. Students enrolled in AS-A2 Cambridge or A level courses would find this practical beneficial. Notes for the teacher are also included Key words: buffer, acid-base, equivalence point, buffer zone, practical, pKa, indicators.

This resource would suit A2 students. It contains 4 pages of problems, which can either be printed on both sides and made into an 4-page booklet or used as two separate 2-page problem sheets. The problems focus on the assignment of signals to the different hydrogen environments in 2-5 carbon organic aliphatic molecules. Some problems ask the student to distinguish between isomers based on the number and type of signals. The start of the worksheet asks students to decide how many signals they can expect based on symmetry arguments. In all cases students are asked to justify their assignments. Other worksheets are currently being developed that will include aromatic systems and problems based on the combination of IR, Mass spec, 1H and 13C NMR spectra. If you find any mistakes please give me feedback and I will address and send you an updated version.

This resource consists of two worksheets. The first work sheet is based on a series of unknowns (a-o) that are either a reagent or a product (about 30-50 min. to complete depending on ability of student). The reactions are limited to oxidation, reduction, nucleophilic substitution, chlorination, cyanation and addition reactions. The worksheet will suit students A-level chemistry or with an interest in the National Chemistry Olympiad competition. The second worksheet (ws3) is 3 pages long and has 24 questions requiring either structures, short answers or descriptions for answers. Answers are included.

This resource focuses on laboratory equipment found in a typical school. There are four worksheets. The first bundle relates to laboratory equipment that is typically used in schools. The student either provides the English word or the Chinese word. Pictures are given on each worksheet. The answers are also provided. The second bundle relates to words we typically use to describe what we observe in an experiment. It includes terms that are important for drawing and describing graphs. The feedback from the classroom has been very positive and some colleagues from other schools have asked to use these resources for their Chinese International students. If there are specific topics you would like please tell me as it is likely they are currently being developed / or used.

This practical gets students to measure the rate of reaction when a thiosulfate solution is mixed with hydrogen peroxide. The resource includes a brief background to the experiment, a sheet to record data and some instructions for the Technician to help make up the solutions. This resource can be used for younger students to improve their experimental technique and interpretation and graphing skills (leave out the chemical equations) or for A2 Cambridge, Honors or AP students who wish to measure more detailed reaction kinetics. Some errors were found and have since been addressed (2016) Key words: kinetics, reaction rate, collision theory, iodine clock reaction, experiment

This is a 1 hour test (or work sheet). There are 3 questions (8 pages long). Each requires the student to use information from Infra Red, Mass Spectrometry and C-13 NMR spectra to elucidate the different compounds. Students are expected to give evidence to support their assignments. This test would be useful for AP or Honors students. Answers are included.

This resource consists of 3 worksheets (some double sided) and answers. The first is a starter activity (T or F) and takes about 10-20 minutes to complete. The elements-compounds-molecules and mixtures worksheet has a variety of exercises. The states of matter worksheet largely focuses on a number of short answer questions based on every day scenarios. There are also some diagrams to complete. The resources target students who are in year 8-10 (13-15 years old) depending on curriculum.

This resource consists of 2 worksheets: 25 calculation problems (and worked answers) involving aspects of acid base chemistry and some general pH calculation notes, which initially cover simple calculations. . The first half of each work sheet covers pH calculations in both acid and base conditions and calculation of H+ and OH- ion concentrations. The 2nd side of the worksheets focus on pH calculations involving partial neutralisation reactions where the student has to work out what species is in excess before calculating the pH. Some problems also involve the use of n=m/M equation. These problems would suit students interested in Honors, AP or wanting to enter the National chemistry Olympiad competition.

This resource is two pages long and covers the following topics: atomic structure, balanced word and symbol equations, balancing a combustion reaction, interpreting electronic configuration, an electrolysis question (ZnBr2) and forming ionic compounds. It could be used as either a test or a worksheet. Answers are included. The level would be useful for entry level chemistry students

This resource contains 9 pages of detailed notes and worked examples as well as a two 2-page worksheets that contains some straight forward to difficult (using a quadratic equation) pH calculations. The detailed notes work though a variety of scenarios and some of the associated misconceptions. The notes would be useful for both new chemistry teachers and students. The problems will be suitable for students in an Honors or AP course or those wanting to trial for the National Chemistry Olympiad competition. Other problem worksheets re also available at Drogchem. Key words: buffer, acid, base, acidity constant, pH calculations.

This resource consists of 4 problems in which the student has to work out the % of different compounds in a mixture. They are challenging and would suit mathematically strong students who are enrolled in Honors, AP or who want to compete in the National Chemistry Olympiad competition.

This resource consists of 2 double-sided worksheets made up of short answer questions (and answers) relating to atomic structure; in particular, ionisation energy, atomic and ionic radii and electron affinity. The questions would suit students studying in an Honors or AP program or students wanting to compete in the National Chemistry Olympiad competition. The students are required to write structured answers rather than limited 2-3 word answers therefore encouraging writing skills and building their understanding of the periodic table.

This resource consists of some general REDOX notes and 1 work sheet with 6 hard-to-difficult REDOX reactions to balance. The difficulty is due to the fact the students must first convert word equations into symbols. One problem requires them to balance under alkaline conditions and the metal product is not immediately obvious. The problems introduce the students to uncommon reactions where the acid itself is converted to products other than hydrogen gas. This worksheet would be suitable for students doing AP, Honors or wanting to take part in the National Chemistry Olympiad competition.

This resource has a set of notes with worked examples to explain how to determine Lewis structures, molecular shapes and formal charges. The accompanying worksheet uses these skills to predict shapes and reason the bond angles. Some problems are based on the comparison of two molecules.

This resource consists of notes and worked examples to show how to establish a molecule's Lewis structure and molecular shape. The problems are more difficult than ws1 and would suit students who are doing Honors, AP or are interested in competing in the National Chemistry Olympiad competition.

There are two worksheets (with worked answers) in this resource. WS1 focuses on word equations and limits reaction to those of oxides, hydroxides and carbonates. Notes are also provided. The intention is for students to get used to the idea of always writing down the salt and that water is the other product. WS2 asks students to balance the symbol equations. The equations are limited to acids reacting with oxides, carbonates and hydroxides. Both worksheets are also part of a larger resource called "Chemistry: balancing equations involving metals and their salts". This resource will suit students learning about balancing equations for the first time.

This resource contains two fun-worders based around the first 20 elements of the periodic table. In the first fun-worder, the student has to find the element. Each element succeeds its atomic number (find the name and you find the atomic number). The 2nd fun-worder has both the proton number (before the word) and the atomic mass (after the word). The student then fills in the periodic table grid (supplied) in the correct order. The students love these activities and it can take a good 45 minutes to complete. It is fun and builds familiarity with the PT. Other shorter activities are included: match symbols and names, and electron configuration practice.

There are 2 worksheets (and answers) as well as notes and worked examples (ws2). WS1 has 2 pages of questions where the student has to choose whether a reaction is either endothermic or exothermic, draw and label an energy profile. There are also some simple calculations to determine the amount of energy given off from a known mass of an organic compound. WS2 contains notes, worked examples and 10 problems (and answers) focused on the equation Using q = mCΔT and Hess's law. The problems will be useful for students enrolled in Honors, AP or those who would like to sit the National Chemistry Olympiad competition. The problems are of straight forward to moderate difficulty. Key words: Hess's law, thermochemistry, enthalpy, heat, thermodynamics, calculations.

This resource consists of 3 pages of REDOX reactions involving the following tasks: drawing a cell diagram, balancing equations and calculating the EMF of the cell in question. The worksheet will suit students enrolled in Honors or AP chemistry. Answers are provided. Key words: AP, REDOX, Olympiad, EMF, calculations, cell diagrams.

This worksheet has 2 pages of problems (and answers) which require a Lewis structure and a molecular shape. Some of the questions ask students to compare molecule bond angles and explain why they differ. A set of notes with examples is included. This resource would be useful for students enrolled in Honors or AP.