Next page chemical laboratory

Read over the entire laboratory activity. Write balanced chemical equations for the dissociation of NaCl, MgCl2 and AICI3 in water. Form a hypothesis as to which of these compounds would conduct the most electricity and the least electricity. Record your hypothesis on the next page. 

Students in introductory biochemistry laboratory may use methodology books more than any other type, although much of the data is now on the Web. While doing biochemical experiments, you may need physical, chemical, and biochemical information such as definition of terms, R values, molecular weights, and physical constants. This information is easily found in the many handbooks and collections of biochemical data. Some useful handbooks with a brief description of contents are listed on the next page. 

Some additional examples of the atomic masses of the naturally occurring isotopes of several elements are given in Figure 3.5 on the next page. Isotopes of an element may occur naturally, or they may be made in the laboratory artificial isotopes). Although isotopes have different masses, they do not differ significantly in their chemical behavior. 

Originally conceived by the Ohio-based Chemical Rubber Company as an incentive to encourage sales of their laboratory supplies, the Handbook started life as a small booklet of useful mathematical formulae and laboratory data. By 1913, it had grown to 116 pages and was published in its own right as the Handbook of Chemistry and Physics. The Editor was William R. Veazey, an Associate Professor of Chemistry at the (then) Case School of Applied Science. Who could have predicted that this pocket book was to become so well known that its users came to refer to it as the Rubber Bible or, simply, the CRC To paraphrase a review of the 88 edition - if you can t find a copy in your lab, that s because someone in the next lab has stolen it. ... 

Students may think all reactions are fast and that this is a definition for a chemical reaction itself. Events that go beyond time frames common in school may not be regarded as chemical reactions there is a strong association with reactions taking place in chemistry lessons only and not outside a lab. Commonly, everyday chemical reactions take hours, months or years to complete. Explicit discussion is needed for students to recognise that the same rules apply to slow , non-laboratory-based reactions and those seen within the hour-long time-span common to many chemistry lessons. The first activity suggested in the next section (page 152) will help to address this. Other examples to discuss could include ... 

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