Chemistry AP Book
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Chemistry
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Preparing EDTA solution
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SCIENCEPALOOZA PROCEDURE: PREPARING EDTA SOLUTION MEASURE 4g OF EDTA ON THE BALANCE (USE SENSITIVE BALANCE): MASS OF CONTAINER+EDTA=_______g (A) MASS OF CONTAINER:_______g (B) (A)-(B)= 4g USE BUNSEN BURNER TO HEAT AND DESSICATE (AT 80 DEGREES CELSIUS). NOTE: CORRECT THE SALT?S WEIGHT FOR 0.3% MOISTURE IN THE FINAL MOLARITY CALCULATION. WEIGH 3.8 GRAMS OF __________ AND TRANSFER IT INTO A VOLUMETRIC FLASK USING A POWDER FUNNEL. RINSE THE FUNNEL USING A SMALL AMOUNT OF DISTILLED WATER BEFORE REMOVING THE SALT. THEN ADD ENOUGH EXTRA PURIFIED WATER TO MAKE 700 ML. USE A DRY, UNCONTAMINATED CONTAINER WITH A NON-GLASS STOPPER. SWIRL THE SOLUTION UNTIL THE POWDER HAS DISSOLVED (LEAVE FOR 15 MINUTES). ADD MORE PURIFIED WATER UNTIL THE 1 L MARK AND MIX WELL.
Chem Lab- Molar Volume
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Molar Volume of a Gas Data Analysis: Table 1: Measurements of Substances formed/used and Pressure/Temperature of the Room Mass of Mg Strip (g) .0390 g Room Pressure (kPa) 102 kPa Volume of H2 gas (converted to liters) 0.0406 L (40.6 mL) Room Temperature (converted to Kelvin) 293.55 K (20.55?C) Water Vapor Pressure (kPa) 2.41 kPa Table 2: Calculations Moles of Mg .00160 mol Mg Moles of H2 1 mol H2 Partial Pressure of H2 99.59 kPa Adjusted volume (of dry H2 at STP) .0371 L Molar Volume of STP .0371 L Percent Error 99.8% Conclusion:
Organics definitions
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Organic definitions Homolytic fission ? when a bond breaks by splitting the shared pair of electrons between the two products. It produces two free radicals, each with an unpaired electron Heterolytic fission ? when a bond breaks with both the shared electrons going to one of the products. It produces two oppositely charged ions. Elimination ? when a small molecule is removed from a larger molecule, leading to the formation of an unsaturated product Addition reaction ? when two reactants combined to form a single product. This type of reaction is characteristic of unsaturated compounds containing double or triple bonds
Electronegativity
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Electronegativity is used to describe and find bonds and compounds. If the E.N is from 0-0.3 it is "pure covalent" or non polar. If the E.N is from 0.31-1.7 its is "polar covalent" and considered polar. If the E.N is over/ greater than 1.7 it is considered Ionic.
conclusion to observation lab
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Title: Observation Lab Purpose: To make observations and to distinguish between observations and inferences. To distinguish between quantitative and qualitative observations. To describe the role of observations in the Scientific Method. To practice safety and lab skills. Materials: Substance A Substance B Substance C Test tube Graduated cylinder Cork Eye dropper Containers for substances A and C Procedure: Put on goggles and apron. Observe substance A, B, and C. Fill test tube 2/3 of the way with A. Add a dropper full of B to the test tube. Break substance C into small pieces and add to the test tube. Stopper with cork immediately. Place test tube in graduated cylinder and stand back. Observe. Data Tables: Conclusion T. Theory/Concepts:
Percent Error
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Theoretical - Experimental
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Theoretical
**Theoretical- actual data that should be collected.
**Experimental- data personally collected during trial.
chemistry lab
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Fall 2011 CHM 101 Laboratory Schedule Monday Tuesday Wednesday Thursday Friday Sept. 5 Labor Day 6 Check-in/Safety Film 7 Check-in/Safety Film 8 Check-in/Safety Film 9 Check-in/Safety Film 12 Check-in /Excel Session 1 2 13 Excel Session 14 Excel Session 15 Excel Session 16 Excel Session 19 Experiment 1: Chromatography 20 Experiment 1 21 Experiment 1 22 Experiment 1 23 Experiment 1 26 Experiment 2: Calibration of Laboratory Glassware 27 Experiment 2 28 Experiment 2 29 Experiment 2 30 Experiment 2 3 Experiment 3: Empirical formula of zinc iodide 4 Experiment 3 5 Experiment 3 6 Experiment 3 7 Experiment 3 10 Columbus Day 11 Monday schedule 12 13 14 17 Experiment 4: Properties of Common Ions 18 Experiment 4 19
Significant figures
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Noah Spiner 8/25/10 Chemistry p.2 Notes Rules for counting significant figures All non-zero digits are significant. Ex ? 12.83 (4) 16935 (5) Zeros between other significant figures are significant. Ex ? 12,038 (5) 169.04 (5) Zeros to the right of a decimal point and to the right of a number are significant. Ex ? 169.00 (5) A zero standing alone to the left of a decimal point is not significant. Ex ? 0.421 (3) Zeros to the right of the decimal and to the left of a number are not significant. Ex ? 0.000421(3)
Competitive ELISA of Digoxin
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Sahithi Battula Lab Partner: Antoine Le Chem 3500L 01 November 2011 Competitive ELISA of Digoxin Data Analysis It appears as though the replicates are not very far off from each other. After the two outliers were eliminated from the data, the highest range was 0.242. Although this is a high range when compared to the magnitude of the presented values, the average range between the duplicates in one column is only about 0.091. The two outliers that were removed through the Q test were 0.210 from the first column with a concentration of 10000 ng/mL of digoxin, which had a Q value of 0.816, and 0.372 from the 5000 ng/mL digoxin, which had a Q value of 0.868. Conc. (ng/mL) Absorbance Values Range (before Q test) Range (after Q test) Qgap (min) Qgap (max) 10000 0.172 0.173
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