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 includes a colour-coded power point pack (51 slides): the first half focuses on inheritance and how information is ultimately coded into proteins. The 2nd half covers sexual vs asexual reproduction, genetic variation, mono-hybrid inheritance, punnet squares, pedigree charts and natural selection. The slides are kept simple and are not cluttered with lots of words. The user can delete slides not required for their specific course. My students tell me the slides are easy to annotate and are very good for exam preparation. A set of learning objectives is given as well as three 2-page problem sheets that focused mainly on punnet squares and pedigree charts (answers provided). Two of the problem sheets can be bought separately from this shop ( "Biology: punnet square problems and interpretation of pedigree charts").

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 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 Honors and AP 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.

A 4-page worksheet with problems (and answers) on work/ energy, power and force. The student is required to rearrange equations.

This resource consists of two experiments. The first is the permanganate - oxalic acid titration to standardise the permanagate. The second uses the permanganate solution to determine the concentration o f a solution of unknown concentration of Fe(II). These practicals would suit Honors and AP students experienced with REDOX chemistry. The resource has the template for data collation built into it. The resource is 4 pages long. Key words: titration, oxalic acid, permanganate, iron, calculations, practical

This worksheet has bond enthalpy and lattice energy calculations and would be suitable for Honors and AP-enrolled students. Key words: Hess's law, bond enthalpy, Lattice energy, calculations.

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 student instructions to determine the vitamin C content of a commercial vitamin C tablet (or a Technician's unknown sample). There is an introduction outlining the different REDOX steps involved in the back titration, a data recording sheet and instructions for the Technician for the preparation of the different reagents. This practical would suit students who are studying REDOX chemistry in Honors or AP courses.

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.

This work sheet has a series of unknowns (a-o) that are either a reagent or a product. The reactions are limited to oxidation, reduction, nucleophilic substitution, chlorination, cyanation and addition reactions. The worksheet will suit students enrolled in Honors, AP or with an interest in the National Chemistry Olympiad competition. Answers are included.

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 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 contains 4 simple experiments that have been successfully used in the laboratory for students aged from 10-14 years of age. The aim, through simple experiments, is to encourage safe working with chemicals and familiarity with equipment. One experiment is based on the use of plastic burettes where students are asked to work out which solution is the strongest (most concentrated). The use of burettes adds the 'wow' factor for budding young Scientists. They will talk about it for weeks to come. The experiments are based around color change with common acids and bases and Universal Indicator. A short set of instructions explaining how to make a home made indicator is also included.

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 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 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 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 contains two double sided problem sheets (and answers). The first is a series of punnet square focused problems and the 2nd asks students to interpret and answer questions from two pedigree charts. Both also contain some short answer questions. It will suit students who have not studied Genetics before. Key words: homozygous, heterozygous, dominant, recessive, punnet squares, zygote, chromosomes, pedigree charts.

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.