Lab%2003%20%28-%29%20-%20Separation%20of%20a%20Mixture%20%28STUDENT%29

Lab%2003%20%28-%29%20-%20Separation%20of%20a%20Mixture%20%28STUDENT%29

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Separation of a Mixture Created by Jackie Jurchenko Created by Jackie Jurchenko
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Introduction A ______ is a combo of 2 or more _____  substances A pure substance can’t be separated using  _____ means (________, boiling, ________).  But, we can separate mixtures! Today separating: SiO 2  – ______ ______ (sand) ______ – (table) salt ______ – Ammonium Chloride (a salt)
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Methods 1. ________ (of NH 4 Cl) – when a substance  goes from a solid to a gas, without first  becoming a liquid  (dry ice) 2. ______ salt (NaCl) – using solubility. NaCl is  ______ in water, the sand isn’t. Once salt is  dissolved… 3. ______ the sand. The liquid will contain the  ______ and the sand will be on the ______  paper.
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Diagram 1 2 3 4 5 6 7 8 9 1 10 2 3 4 5 6 7 8 9 1 1 NH 4 Cl Add H 2 O Only add H 2 O after your crucible is At constant weight! (0.002g) – why? H 2 O and NaCl sand H 2 O and NaCl
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Unformatted text preview: Sand/filter paper (put in oven to dry) Start: 47.964g 1 st heat: 47.153g 2 nd heat: 47.151g ‼ Calculations For each component, calculate Mass % Mass % = _____ ___ (individual component) x 100 __________ (started with) Tips Only use ____ grams of mixture!! Do _____ touch crucible with ______…(?) Must wait for __________ to cool before weighing. (convection currents) Stir between ________ to help go faster! Use __ water and use same balance throughout! ______ filter paper before filtering. When evaporating water from salt, put watch glass over to _______ loss – ______ the watch glass first! ______! Put it in the appropriate container....
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This note was uploaded on 01/19/2012 for the course CHEM 1211L taught by Professor Dennison during the Spring '08 term at Kennesaw.

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Lab%2003%20%28-%29%20-%20Separation%20of%20a%20Mixture%20%28STUDENT%29

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