Pre-Laboratory Assignment 1. What are the hazards associated with sodium hydroxide (NaOH) solution? Sodium hydroxide solutions‚ especially in high concentrations‚ are toxic and corrosive. 2. (a) What buret reading should you record when the liquid level is as shown in Figure 2? In Figure 2‚ the lower meniscus lies below the 3 mL line and 4 minor gradations that signify 0.1 values. Estimating the uncertain digit to be 0.04 mL‚ the reading we record for this particular buret is 3.44 mL.
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Lab Report 1 Introduction: Proper chemical formulas entitle many challenges such as the Law of Multiple proportions that states that there may be more than one plausible mole ratio for the elements in that compound. However if we determine the mass of each element in the compound we will be able to get the true chemical formula. In this experiment‚ we used the law of definite proportions to find the chemical formula for a hydrated compound containing copper‚ chlorine‚ and water molecules
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The Lab Report‚ Significant Figures & Working with Numbers CHMY 142-18 Experiment 1 September 4th‚ 2009 Introduction: This experiment is dealing with the relative accuracy of an individual measurement. Data will be provided to perform the calculations asked for. The purpose of this experiment is to know how to use significant figures and to get formularized with making proper laboratory reports. Procedure: Use the data table’s information to solve the missing
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OCEAN COUNTY COLLEGE OFFICIAL COURSE DESCRIPTION DEPARTMENT OF SCIENCE AND ENGINEERING 1. Course Number and Title: CHEM-181 General Chemistry I 2. Semester Hours: 4 Contact Hours: (3 + 2) Lecture Lab 3. Catalog Description This course‚ intended for science majors‚ is the first course of a two-course sequence. Course topics include stoichiometry‚ inorganic nomenclature‚ solutions‚ gas laws‚ thermochemistry‚ atomic structure‚ and chemical bonding. The laboratory work includes
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# Now You See It – Copper Cycle Lab The purpose of the lab is to discover what happens when someone executes a series of procedures‚ beginning with copper metal. What is done | What is observed | 1. Started with copper‚ Cu (s). | reddish‚ brownish‚ orange-ish‚ powder-like | 2. Added nitric acid‚ HNO3 (aq). | acid turns blue and smells like chlorine. | 3. Added water‚ H2O (l). | stayed the same | 4. Added sodium hydroxide‚ NaOH (aq). | changed consistency‚ gel-like | 5. Heated the
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05.03 Gas Laws: Lab Report Directions: Read/ Study all the lesson information in the 5.03 lesson then click the activity tab to perform two virtual labs. (There are recorded Teaching Videos for lesson 5.03. To view them click the “Help Sign” on the announcement page. Next scroll down to Lesson 5.03 stuff and you should see 5 part video links that will cover the lesson content.) Virtual Lab 1- Part I: Boyle’s Law A sample of gas is trapped in a sealed container‚ which has a movable lid. Moving
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The lab was to include a purpose‚ procedure‚ data/observations‚ all reactions and side reactions written out with qualitative data beneath each product and reactant except H20‚ and a summary. The purpose of this experiment is to observe the qualitative aspects of a series of reactions involving copper. Procedure 1.Measure about 1g of solid copper. 2.Place Cu in Erlenmeyer flask and place flask under fume hood. 3.Add dropwise 15M HNO3 until solid copper is completely reacted. 4.Place flask
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Catalyst Purpose/Problem: There are four parts to the Enzyme Catalyst lab - Activity A‚ B‚ C‚ and D. In activity A‚ the characteristics of enzyme actions will be observed. The main purposes are to determine the rate of an enzyme catalyzed reaction‚ to study the characteristics of an enzyme mediated reaction‚ and to observe the effect of heat on enzyme activity. The purpose of activity B is to use the Titration Protocol to determine the initial amount of H 2O2 present in a solution. The
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experiment‚ we examined the effectiveness of fractional and simple distillation to determine which is more successful at extracting a pure sample. This experiment was very successful. We are able to determine the success of the experiment but calculating refractive index of both types of distillation. Based on the theoretical and actual refractive index of both simple and fractional distillation we can determine the success of the experiment. The results are also supported by general conditions
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Pepin III initiated the usage of the silver coin. As European exploration of foreign lands intensified during the sixteenth century‚ silver earned a high-ranking position on the global market as one of the most economically valuable natural resources in the world. The availability of silver increased and its popularity prompted the opening of new European and South American mines. As more mines were established‚ European governments started to issue larger silver coins‚ lessening the usage of gold
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