This resource consists of 4 worksheets (13 pages of problems in total). The problems require students to write balanced equations (some are redox) and use calculations to solve the problem. The problems would suit AS and A2 students or those wanting to compete in National Chemistry Olympiad competitions. (18 Jan2018 post script: an additional 2 w/s have been added that focus only on waters of crystallisation).

This resource consists of 2 worksheets and answers. It covers definitions, short answer questions and calculations (solubility products, solubility, common ion effect). These w/s would suit students doing Cambridge A2, IB and other higher order chemistry courses. (some typos were removed 12 May 2019). Please leave feedback about whether this material meets your needs or if you find any mistakes.

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 consists of a 4 page problem booklet (and answers); a very brief set of notes is at the start of the booklet. The problems include some short answer questions (eg relating to Boyle's or Dalton's laws) and some calculations. The booklet would suit students doing AS or IB chemistry courses.

This resources contains 5 pages of problems (2 double-sided wrk sheets) that include * Alkanes: name and / or draw isomers * Alkenes: naming and/or draw isomers, organic transformations and geometric isomer problems. In the latter case students are asked to work out how many isomers are possible for a compound with multiple double bonds). This worksheets will suit students studying for AS or IB organic chemistry. they can be sued as 2 sided w/s or as separate w/s as starters. Answers are provided.

This resource is a test that covers various aspects of periodicity: sub atomic numbers, electron configuration, assigning charge to ionic species, some electrolysis questions and a few word equations (eg. photosynthesis) requiring symbols equations. The test takes about 1 hour.

This resource contains 9 pages of detailed notes and worked examples as well as a 2-page worksheet that contains some straight forward pH calculations as well as some very challenging calculations due to the weak acid not being so weak. 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. This resource would be suitable for A level students. It will also be useful for those interested in continuing in chemistry or entering the National Chemistry Olympiad competition. Key words: buffer, pH, calculation, acid, base

This resource consists of 9 pages of notes and calculation examples and a three 2-page worksheets to help the teacher or student grapple with buffer calculations. The target is A2 and IB students. The wk/s 4 and 5 (and answers) are essentially a titration on paper where a specific weak acid (or base) is gradually titrated (each problem a new calculation) to show the student the effect the addition of OH ions has on the final pH. Itis a chance to repeat the same calculation multiple times. The format ensures students get to practice on the same system and therefore minimise cognitive overload. Students are encouraged to think about what species are in solution and what part of the titration curve each calculation relates to. I also encourage a novel way of setting out the calculations, which I (and my students) believe minimises potential mistakes.

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 AS-A2 or IB chemistry and students wanting to compete in a 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. 5Feb17: small error found and fixed.

This resource contains 2 worksheets (4 pages) of waters of crystallisation problems (and answers). The exercises would be suitable for students wanting to do IGCSE or AS chemistry programs.

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 resource contains some worked calculations and notes and a 2-page w/s that contains weak acid or weak base problems. 2 misconception questions are also included to encourage students to be able to explain a concept without the need of a calculator. Answers are provided. The detailed pH calculation notes are also found in the other pH calculation resources at Drog-chem’s shop. This resource would suit those doing AS/A2 (Cambridge) or A-level chemistry. It would be useful for those wanting to compete in the National Chemistry Olympiad Competition…

This resource consists of 4 worksheets (some double sided) and answers. * The first two are starter activities and take about 10-15 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 4 work sheets and answers. It would suit students aged 14-16 learning to balance word and symbol equations. WS1 contains 20 word and symbol equations involving the reaction of metals with oxygen, chlorine, water or an acid. WS2 contains 20 word and symbol equations involving reactions between metal salts (carbonates, hydroxides and oxides) and acids WS3 requires the students to complete acid base word and symbol equations WS4 requires symbol equations for reactions with metals. Some of these resources appear elsewhere.

This worksheet (and answers) contains 8 empirical formula problems and answers. It would suit students aged 16-18 yrs and those in Cambridge IGCSE or AS courses. Key words: calculations, molecular formula, empirical formula,

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 A-level or wanting to take part in the National Chemistry Olympiad competition.

This resource consists of some general REDOX notes, which outline how to balance REDOX equations and 2 double sided worksheets (and answers). The exercises include oxidation number elucidation, balancing half equations and balancing full equations. This resource would suit students who want to progress in the Honors program.

This resource has a set of notes with worked examples to explain how to determine Lewis structures, molecular shapes and formal charges. The accompanying worksheets (and answers) use these skills to predict shapes and reason the bond angles. Some problems are based on the comparison of two molecules. ws2 problems are more difficult than ws1 and would suit students who are doing A level chemistry and who want to be challenged or are interested in competing in the National Chemistry Olympiad competition. This resource has combined material from 3 previously available resources. If you find any mistakes please make contact with me and I will correct and send an updated version.

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) and notes 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. With all the best intentions in the world, mistakes do get made. Please tell me if there is an error and I will correct it and organise to send you a corrected copy.