Week 5 Lab Worksheet 1

Match each chemical or item with the proper disposal or cleanup method. Not all disposal and cleanup methods will be labeled. damp metal pieces Part B Return to correctly labeled "drying out" beaker. Answer Bank damp metal pieces Part B Place used items in the drawer. calcium chloride solutions Part A Rinse with deionized water, dry as best you can, return to volumetric flask Part A the instructor. volumetric flask Part A metal sheets Part C Return used material to the instructor. damp metal pieces Part B calcium chloride solutions Part A Pour down the sink with plenty of running water. metal sheets Part c volumetric flask Part A Pour into aqueous waste container. damp metal pieces Part B Place used items in garbage.

PART 4-LABORATORY SAFETY QUESTION 1. In what situations should safety goggles be worn? 2. Why aren't glasses approved as protective eyewear? ANSWER 3. Where is the first aid kit located? 4. Where is the eyewash station located? 5. Where is the fire extinguisher located? 6. What does ABC represent on the fire extinguisher? 7. How is a fire extinguisher operated? 8. Which exit do you use when the fire alarm sounds? 9. Where is the broken glass container located? 10. Where is broken glass placed? 11. Why is there a separate container for glass and paper? 12. Why is no food or gum or drink allowed in the lab? 13. What should be done with long hair during a lab? 14. Why is it dangerous to sit on the lab benches? 15. Why must your lab work area be kept clear of clutter? 16. Why is there no carpet in a science laboratory? 17. Which way do the doors of a science lab open? Why? 18. If your teacher tells you to smell a substance during a lab, describe the correct procedure for smelling it. 19.…

Precipitation Tests for Proteins - Word Decy Joy Garriel DJ Table Tools Table Design 2 Share File Home Insert Draw Design Layout References Mailings Review View Help Layout Tell me what you want to do X Cut - A A P Find Arial -||11 Aa v AaBbCcD AaBbCcD AaBbCcDc AaBbC AaBbCcC AaBbC AABBCCD 1 Normal No Spacing 1 No Spac. Heading 1 Heading 2 Heading 3 Heading 4 Le Copy ab Replace Paste BIU abe x, x A • ay A e Select Format Painter Clipboard Font Paragraph Styles Editing PART II: PRECIPITATION BY INORGANIC ACIDS TUBE NO. TREATMENT RESULT and OBSERVATION 1. 3 mL of Concentrated 5% egg HCI drop by albumin drop solution 2. 3 mL of 5% egg Concentrated H2SO4. albumin solution 3. 3 mL of 4. Sulfosalicylic Acid 5% egg albumin solution Generalization: Page 5 of 10 1245 words LE English (Philippines) & Accessibility: Investigate 100% 7:14 pm P Type here to search 23°C Rain 4») * A ENG W 26/12/2021 近

16 You need to make an aqueous solution of 0.237 M cobalt(II) fluoride for an experiment in lab, using a 250 mL volumetric flask. How much solid cobalt(II) fluoride should you add? grams Submit Answer Review Topics] [References] Use the References to access important values if needed for this question. Retry Entire Group 8 more group attempts remaining Cengage Learning Cengage Technical Support Previous Next> Save and Exit

Part IV Cabbage Juice Indicator Chop cabbage into small pieces until you have about 2 cups of chopped cabbage. Boil for at least ten minutes to allow time for the color to leach out of the cabbage. Allow it to cool for 15 min • Filter out the plant material to obtain a red-purple-bluish colored liquid. 1. Add 1-2 drops of cabbage juice into a small bowl 2. Add 3-5 drops of vinegar into the bowl with the cabbage juice 3. Observe Is this a chemical change or physical change? Explain? Store the excess cabbage juice in your refrigerator, you will need them for future experiments.

Answers to all activities will be written on the answer sheet provided. Activity 1 You will need water color or paint (color white and red/black), small container and plastic spoon. Materials may also be based on what is avail able in you place. Pour a small amount of white colored paint in the small container. Slowly add the colored paint then mix. Observe what happens. Repeat if necessary. Questions: 1. What is the resulting color? 2. Does the color produced differ from the original color? Why? 3. Do you think the color white and red/black disappe ar totally?

2 Fe + Oz→2 FeO The chemical in the pink box is a... A. subscript B. coefficient C. reactant D. product The number in the green box is a... A. subscript В. соefficient C. reactant D. product The numbers in red boxes are... A. subscripts В. соeficients C. reactants D. products The chemicals in the purple box are... A. subscripts В. соefficients C. reactants D. products

Carla is using a fertilizer that contains nitric acid. How is nitric acid classified? strong acid weak acid strong base weak base Save and Exit Next Mark this and return ContentViewers/AssessmentViewer/Activit.

7. You can see an MSDS below. Please answer the following questions related to the MSDS. a) What is the name of this chemical? b) What should you do if someone drinks the chemical? c) Would this chemical catch on fire if it was exposed to flames? d) If this chemical gets in your eye what should you do? e) What color is this chemical? f) What should you do if someone spills a small amount of the chemical?

Number two plz

Please answer in tipping format for

doug began preparing laboratory surface disinfectant from chlorine bleach. he put on a chemical resistant apron and gloves and then removed the bleach container from the special chemical cabinet. he carefully placed the container on the laboratory benchtop and began to add the chlorine bleach to distilled water. nearby workers began complaining of burning eyes. doug was reprimanded by the supervisor. Explain why.

Catra wanted to determine the concentration of copper(II) chloride at an unknown concentration .She began by trying to determine the value of epsilon (ε) using beers law for copper(II) chloride. Catra remembered in lab when they wanted to solve for epsilon they would test the absorbance for three different concentrations of a known solution and then graph it. Catra got frustrated and asked Shera what to do next to determine epsilon. What should Shera tell Catra?

Pls help ASAP ON ALL ASKED QUESTIONS PLS PLS

1. Select a product from the stock shelf and transfer the liquid to a test tube. 2. Select a paper pH test strip. Record the color of the test strip in the data chart. Transfer it to the same test tube. 3. Note any color change of the paper and record in the data chart. 4. Drag the test tube containing the test strip over to the color chart to determine the pH range indicated by the paper. Record your results. 5. Record your conclusion about whether the substance is an acid, a base, or a neutral substance. 6. Repeat for all substances.

Blank 1 is the breakdown of chemical compounds in organic matter that results in the release of nutrients in soluble inorganic forms that are available to plants. Blank 1 Add your answer

Use the following data to calculate the Ksp value for each solid. a. The solubility of CdC2O4 is -4 1.2 x 107 mol/L. Ksp - b. The solubility of Bil3 is 1.32 × 10-5 mol/L. Ksp Submit Answer Try Another Version 1 item attempt remaining

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Write the balanced equation for the neutralization of acid rain (assume HNO3 is dissolved in water) by limestone (calcium carbonate). Express your answer as a chemical equation. ΑΣφ ? DA chemical reaction does not occur for this question. Submit Request Answer Provide Feedback 76 tv

____________ in the soil can prevent lakes from becoming acidified due to acid rain.   sodium hydroxide   potassium nitrate   ammonia   potassium hydroxide   limestone

Pre-lab question #8: Suppose you were dissolving a metal such as zinc with hydrochloric acid. How would the particle size of the zinc affect the rate of its dissolution? As the particle size of the zinc increases, the rate of dissolution AA (decreases/increases).

If someone could answer the rest of them this was super helpful I just need to finish this packet by tomorrow morning and don't have time to do it myself!

2. A chemical reaction is temperature sensitive, as shown below. AB+C + Temp °C 10 20 30 40 Keq 9.0 x 10-12 12.8 x 10-¹2 1.6 x 10-11 1.9 x 10-¹1 a. Using excel, make a Van't Hoff plot. Include a table showing any results from calculations. Also include trend line, and best fit equation on the plot. b. Use the information to determine AH° and AS c. Is this reaction entropically or enthalpically driven? Explain your reasoning.

PART 3- LABORATORY EQUIPMENT EQUIPMENT NAME FUNCTION To hold test tubes. Attaches to a retort stand to support glassware being heated. To pour liquid from a large container into a small container. To provide a flame during an experiment. ones To light the Bunsen burner. To attach test tubes to a retort stand. To clean substances out of a test tube. To hold a hot crucible or flask. To hold a hot test tube. To place on the lab bench to prevent burning or to use with ring clamp. To transfer small amounts of liquid. To grow bacteria or contain small experiments. To hold liquids. To measure liquids. To contain experiments (a stopper can be used to close the flask). To hold a hot beaker. To perform an experiment with a different substance in each well. To hold chemicals and perform experiments in. To scoop and transfer small amounts of substances, To stir during experiments that involve mixing or dissolving.

All changes save 7. When two solutions are mixed, a color change occurs. The data tables show the time between mixing and the color change for two sets of conditions. For Condition One, the solution concentrations were constant and temperature varied. For Condition Two, the temperature was constant and concentrations varied. Condition One: Concentration Time for Temperature (°C) Sample Color to Change 1 10° 36 sec 22° 14 sec Condition Two: Temperature Time for Concentration Sample Color to % Change 1. 100% 15 sec 2. 50% 24 sec Which of these statements is true according to the data? O The reaction rate is greater at 22°C than at 10°C. O Reducing the temperature increases the rate of the reaction. The reaction is affected by changes in temperature not by changes in concentration. O Decreasing the concentration increases the reaction rate. PREVIOUS 17 of 25 NEXT SAVE & EXIT

What is the molarity of the three solutions ?

Help me please ! Please do it correctly neat and clean

Which of the following describes a gradient elution process?       stationary phase has varying concentration     mobile phase has varying concentration       stationary phase has static concentration        mobile phase has static concentration

If we need the information on how to dispose a certain chemical substance, we need:GHS LabelNFPA diamondSDSFacebook pages A.) If all 4 statements are trueB.) If 3 of the 4 statements are trueC.) If 2 of the 4 statements are trueD.) If only 1 of the 4 statements is trueE.) If none of the 4 statements is true