Water Body Z Titration volume (ml) DO sample (0) DO blank (0) DO sample (5) DO Blank (5) 4.Calculate the concentration of BOD in the body of water Z! 0,5 0,6 0,45 0,59
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- If pond water has a pH of 5, the hydroxide concentration would be: a. 10-5M. b. 10-10M. c. 105M. d. 109M. e. 10-9M.Titration volume (ml) Water Body X DO sample (0) DO blank (0) DO sample (5) DO Blank (5) 2.Calculate the concentration of BOD in a body of water X! 0,6 0,7 0,05 0,68Water Body Y DO sample (0) DO blank (0) DO sample (5) DO Blank (5) Titration volume (ml) 3.Calculate the concentration of BOD in a body of water Y ! 0,5 0,6 0,3 0,55
- Desired Desired Initial Volume of Stock or Volume of Concentration Volume Concentration Previous Dilution Distilled Water (C2) (V2) (C1) (V1), µL (V2- V1), µL 100 mg/dL 1.2 mL 200 mg/dL 75 mg/dL 1.2 mL 100 mg/dL* 50 mg/dL 1.2 mL 25 mg/dL 1.2 mLIs there a difference between pH measurements using the pH meter and the pH paper? Compare the initial pH and the final pH of each sample. What was the most effective buffer? What was the least effective? Solución pH inicial pH final Diferencia water 7.45 2.48 0.1 M NaCl 7.28 2.03 milk 6.78 6.45 buffer de fosfato 8.76 7.78 **** Calculate the difference (subtract) the initial pH - final pH values to identify the effectiveness of each solution as a buffer. Values with little difference mean that a less drastic change occurred and are therefore more effective. On the contrary, values by much difference reflect drastic changes in pH and are less effective. What do buffers do and why are they important in biological systems?BSA standard Bradford (uL) Distilled Average Tube water (uL) reagent (mL) Absorbance 1 500 0.00700 2 490 10 5. 0.15720 480 20 5. 0.35035 4 470 30 0.50745 460 40 5 0.71540 450 50 5 0.89290 Sample 300 0.24201 5. 3.
- Estimate the pH of a 7.18 x 106 M HF solution. You can calculate the lowest possible pH, knowing that the actual value will be higher. Your answer should contain 3 decimal places as this corresponds to 3 significant figures when dealing with logs. pH will be above Select the solution with the highest pH. Multiple Choice 0.0225 MLIOH 0.0225 MH2CO3 0.0225 MCH3NH221 500 Density O x Safari - Jan 20, 20. X Untitle Density ConversionVo. x UnitConversionSE.. x MeasuringVolume. A. What is the starting volume of water in the graduated cylinder? B. Place the apple into the cylinder. What is the volume in the cylinder how? The water rises in the cylinder because it is displaced, or pushed upward, by the apple. The amount of displaced water is equal to the volume of the apple. C. What is the volume of the apple? (Use the Object volume to check.) Note: Milliliters (mL) are used for liquid volumes, while cubic centimeters (cm") are used for solids. One mL is the same volume as one cm". The apple's volume is measured in cm". Get the Gizmo ready: Activity A: • Replace all objects on the shelf. • Be sure the liquid in the beaker is Water. Sink or float? Question: How do mass and volume affect sinking and floating? 1. Predict: Which objects do you think will float in water? Which do you think will sink? Record your predictions below in the first column of the…PgDn Ctrl Ins Del NW113AACE04–21 6. A student used Dumas procedure to calculate the Molar mass of a volatile liquid and collected following data. Calculate the molar mass of the volatile liquid using the data given Temperature of the water bath = 100.25 °C Mass of water remaining after condensation = 0.556 g Atmospheric pressure = 750 mmHg Volume of the Flask = 255 mL
- 1. Determine the serial dilution used from the original water sample (100 mL) with 4.8 x 105 CFU asshown in the diagram.14 strength Pulmocare 450mL q8h followed by 100mL of water after each feed. Calculate the mixture, and determine the pump rate in ml/hr. Soluted needed Solvent needed Flow rate in mL/hr for feedingCalculate the concentration of protein in the diluted supernatant and the supernatant before dilution at different pH pH 3.5 4.5 5.5 6.5 7.5 8.5 Dilution Factor 5 5 5 50 50 50 Absorbance 0.098 0.027 0.068 0.028 0.032 0.054
