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GCSE and Advanced level Chemistry Calculations: Water of crystallization
WATER of CRYSTALLISATION CALCULATIONS hydrated and anhydrous salts (reedit) Doc Brown's Chemistry  GCSE/IGCSE/GCE (basic A level) O Level Online Chemical Calculations 14. Other GCSE chemical calculations  WATER OF CRYSTALLISATION  method of determining and calculations Keywords: Quantitative chemistry calculations How to determine the water of crystallisation in a salt like compound, hence determine the full formula of the hydrated salt. How to calculate the % water in a hydrated salt i.e. the percentage of water of crystallisation in a salt. How to deduce the number of molecules of water of crystallisation in a salt  fully worked out example calculations of water of crystallisation. Online practice exam chemistry CALCULATIONS and solved problems for KS4 Science GCSE/IGCSE CHEMISTRY and basic starter chemical calculations for A level AS/A2/IB courses. These revision notes and practice questions on how to do water of crystallisation chemical calculations and worked examples should prove useful for the new AQA, Edexcel and OCR GCSE (9–1) chemistry science courses. Spotted any careless error? EMAIL query ? comment or request a type of GCSE calculation not covered? 

14.4 Water of crystallisation in a crystallised salt
Practice questions involving water of crystallization You must be able to do calculations involving moles and mole ratios! Q1 The formula for the blue hydrated crystals of copper(II) sulfate is CuSO_{4}.5H_{2}O.
Q2 The hydrated salt of cobalt(II) chloride has the formula CoCl_{2}.xH_{2}O.
Q3 An evaporating dish weighed 30.55 g. Pale green crystals of hydrated iron(II) sulfate (FeSO_{4}.xH_{2}O) were added until the dish and contents weighed 40.75 g. After gentle heating to constant weight, the dish and anhydrous salt weighed 36.12 g.
Q4 Crystals of Glauber's, a hydrated form of the salt sodium sulfate, has the formula Na_{2}SO_{4}.xH_{2}O.
Where next? See also 14.1 % purity of a product and assay calculations 14.2b atom economy calculations 14.3 dilution of solutions calculations 14.5 how much of a reactant is needed? calculation of quantities required, limiting reactant quantities Chemical & Pharmaceutical Industry Economics & Sustainability, Life Cycle Assessment, Recycling Index of all my online chemical calculation notes and quizzes All my GCSE/IGCSE/US grade 810 level Chemistry Revision notes Advanced UK A/AS level, IB and US grade 1112 preuniversity chemistry Use your mobile phone in 'landscape' mode? This is a BIG website, you need to take time to explore it [SEARCH BOX]
Worked out ANSWERS to the water of crystallisation questions You must be able to do calculations involving moles and mole ratios! Q1 The formula for the blue hydrated crystals of copper(II) sulfate is CuSO_{4}.5H_{2}O.
Q2 The hydrated salt of cobalt(II) chloride has the formula CoCl_{2}.xH_{2}O.
Q3 An evaporating dish weighed 30.55 g. Pale green crystals of hydrated iron(II) sulfate (FeSO_{4}.xH_{2}O) were added until the dish and contents weighed 40.75 g. After gentle heating to constant weight, the dish and anhydrous salt weighed 36.12 g.
Q4 Crystals of Glauber's, a hydrated form of the salt sodium sulfate, has the formula Na_{2}SO_{4}.xH_{2}O.

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