BEHS Chemistry |
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CheMystery Labs Inc. Project Work
As an employee of CheMystery Labs Inc., you will be assigned to a research team with three or four other employees (students). The research team will be assigned a project from the company's current work projects. Information about the project can be found by following the links at the bottom of this letter. You are encouraged to search the internet and your textbook for information concerning your research project. Before you will be allowed to work in the laboratory, you must turn in a preliminary report. Usually, you must describe in detail the procedures you plan to use, provide complete data tables for the data and observations you will collect, and list exactly what equipment you will need. Only after your teacher acting as your supervisor, approves your plans are you allowed to proceed. Before you begin writing a preliminary report, follow these steps. Read the investigation thoroughly, and search for clues. Jot down notes in your packet (notebook) as you find clues. Consider what you must measure or observe to solve the problem. Think about laboratory experiences you have done that used a similar technique or reaction. Imagine working through a procedure, keeping track of each step, and determining what equipment you need. Carefully consider whether your approach is the best, most efficient one.
1. Which fresh squeezed fruit juice contains the most vitamin C (mg of Vitamin C/25 mL of juice)? 4. What commercially prepared orange juice has the most vitamin C (mg of Vitamin C/25 mL of juice)? 5. Which type of fruit drink contains the most vitamin c (mg of vitamin C/ 25 mL of drink)? ----------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------------ 13. How does changing the concentration (%) of salt solution effect the freezing point of water (oC)? 14. Which salt (NaCl, KCl, ______, ________) is the most soluble in water (grams of salt / ml of water)? 16. Which common household chemical is most soluble in water (grams of solid mL of water)? 17. How does the percentage (%) of copper in pennies differ during the years 1983 to 1999? 22. Which brand of dish soap dissolves the most amount of grease (grams of grease/gram of soap)? --------------------------------------------------------------------------------------------------------- 25. Which type of sour candy has the highest amount of acid (mL of base consumed/gram of candy)? 26. Which fruit juice contains the most citric acid (using ammonia)? 27. Which brand or type of vinegar has the most acetic acid (% concentration)? 30. How does the actual amount (grams) of iron III hydroxide precipitate compare to the theoretical yield as predicted by the balance chemical reaction? 32. Which household bleach has the most sodium hypochlorite in it? 34. Does the amount of protein (g) contained in milk vary with the type of milk ( cow, goat, soy, mother's)? (grams of protein / mL of milk) 35. Which water supply has the greatest amount of chlorine in it? (moles / liter) ------------------------------------------------------------------------------- What brand of hydrogen peroxide has the highest concentration (%) of hydrogen peroxide in it? How does the conductivity of a weak electrolyte (acetic acid, ______) compare to the conductivity of a strong electrolyte (NaCl, __________)? Which ratio (mL of acetic acid / mL of sodium acetate) of acetic acid to sodium acetic provides the most efficient buffer? How does changing the voltage of an electrolytic cell of an acidified water solution affect the amount (cc or mL of hydrogen/sec) of hydrogen produced? How does the temperature (oC) affect the rate (grams or milliliters of product formed/sec) of an enzyme reaction? How does the molarity of HCl change the rate gas produced when mixed with Mg (mL of hydrogen gas produced/second)? How does changing the concentration of ________ change the equilibrium of a reaction? Determine the phosphorus content in water / detergents using the spectophotometer. How does the catalyst NaI affect the decomposition of hydrogen peroxide? How many moles of iron a consumed and moles of copper produced in the reaction of iron (nails) with aqueous copper II chloride? What ratio of acetic acid to sodium acetate provides the most efficient buffer? What metals give the best voltages in simple voltaic cells? How is the polarity of a fabric related to its dye holding capacity? |