After performing Part A of the experiment, a student obtained the following concentrations for sodium hydroxide. Calculate the average concentration. Report your answer with four places after the decimal. Trial 1 Trial 2 Trial 3 Trial 4 Trial 5 Trial 6 1.096 0.936 0.984 1.002 1.019 1.053
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- After performing Part A of the experiment, a student obtained the following concentrations for sodium hydroxide. Calculate the average concentration. Report your answer with four places after the decimal. Trial 1 Trial 2 Trial 3 Trial 4 Trial 5 Trial 6 0.977 1.015 0.915 0.943 1.037 0.969Experiment-A8: Spectrophotometry of Cobalt( Pre-laboratory Exercises 1. (a) Define Beer's law and give the mathematical equation (specify each symbol in the equation). concentration of achemical Solution Beer's Law states that the in the following A = Ebc is directly proportional to its absorption of light & can be calculated formula (b) Briefly explain what Beer's plot is and how do you obtain the Beer's constant (k) from the plot. is a straight line with _ay-intercept Beer's plot of zero & a slope of ab oreb. It represents the absorptunity the length Absorbance 8 can be calculate by multiplying Constant by the path length then dinding that value by the 2. The following solutions are prepared from 0.200 MNICI, and their absorbance measured at 725 nm. Solution # 1 2 3 4 5 Volume (mL) of 0.200 M NiCh 1.00 2.00 3.00 4.00 pride 5.00 Volume (mL) of H₂O 4.00 3.00 2.00 1.00 0.00 INICI] (a) Calculate the molar concentration of NiCl₂ in each solution 1-5. Absorbance at 725 nm 0.105 0.210 0.315…The following volumes of 0.000300 M SCN- are diluted to 15.00 mL. Determine the concentration of SCN- in each sample after dilution. These values will be used during the experiment. Sample 0.000300 M SCN- (mL) [SCN-] (M) 1 1.50 2 3.50 3 7.00 4 10.00
- In the experiment, the amount of acetic acid in vinegar was determined by titrating with 0.1 M NaOH solution. In the analysis, three trials were performed to obtain more precise result. The table shows the initial and final burette readings for three titrations: Initial Burette Reading (mL) Final Burette Reading (mL) Trial 1 2.9 10.6 Trial 2 10.6 18.1 Trial 3 18.1 25.7 According to the given data, calculate molarity of acetic acid in the commercial vinegar. Please be sure that your answer includes followings; a) moles of NaOH for each trial b) average mole of NaOH c) average mole of acetic acid in 50 mL solution d) average mole of acetic acid in 250 mL solution e) molarity of acetic acid in vinegar.The instructor reveals that the weak acid is hypochlorous acid, HOCl. The known Ka HOCl is 4.0x10-8 . What is the percent error in the expirement ?15 16 17 18 19 20 21 22 23 24 25 26 27 An aqueous solution at 25 °C has a OH concentration of 1. x 10 "M. Calculate the H,O' concentration. Be sure your answer has 1 significant digits. -10 M dh Submit Assignment Continue MacBook Air F12 F9 F10 888 O00 FB 30 F7 F5 F6 esc F4 F2 F3 F1 & @ # $ %3D 4 5 7 8 9 2 3
- DATA AND CALCULATIONS Show all calculations neatly on an attached sheet. Trial 1 Trial 2 Trial 3 70.6849. 68.0749 2.61g 23.25ML O.65ML 22.6mL Mass of flask + vinegar Mass of empty flask Mass of vinegar used Final buret reading Initial buret reading Volume of NaOH used Moles of NaOH used 0.00226 mol Moles of açetic acid titrated Mass of acetic acid titrated Mass % acetic acid in vinegar 5.0%Based on this student data, calculate the average molarity of the NaOH solution. Standard: KHP = potassium hydrogen phthalate, MM 204.4 g/mol Student Data Trial 1 E KHP mL initial: NaOH mL final: NaOH 2.02 0.57 19.25 Trial 2 2.05 19.25 39.80 Trial 3 1.99 1.65 20.75HP TrueVision HD 4 Texas Workfor Mộc Homework × W. College Physic mical App AN Careers eagleonline.hccs.edu/courses/188795/assignments/3601808 valnabie diler reD 4 dl 10.1Tam Constants | Periodic Table Part O Complete the fourth row. Complete the following table by calculating the missing entries and indicating whether the solution is acidic or basic. Express your answer using two decimal places. Acidic or [H+] [OH-] pH pOH basic? 7.4x10-3 ΑΣφ 3.3x10-10 M pH 8.25 5.73 Is to fa ho II 10 insert
- F. Calculate the concentration of OH 25 degrees at 25 Express your answer using two significant figures and include the appropriate units. G. Calculate the concentration of Na at 25 ∘ C Express your answer using two significant figures and include the appropriate units. I. Calculate the concentration of His− at 45 ∘C . J. Calculate the concentration of HisH at 45 ∘C k. Calculate the concentration of HisH+2 at 45 ∘C . L. Calculate the concentration of HisH2+3 at 45 ∘C M. Calculate the concentration of H+ at 45 ∘C n. Calculate the concentration of OH−at 45 ∘C O. Calculate the concentration of Na+ at 45 ∘C .A student performed titration to find the concentration of acetic acid. Titrant was sodium hydroxide. He went beyond the indicator color change by adding too much titrant. How will his experimental error affect the calculated value for the concentration of unknown acetic acid? calculated value actual value. calculated value < actual value calculated value = actual value. more information is necessary this is not a source of errorYou are asked to weigh 2 g of lithium and add it to 1500 ml of distilled water +2drops of indicator, knowing that the density of water is 1 at room temperaturewhile conducting this experiment. After calculating the amount of LiOH, you need to dilute to prepare 0.25 M of LiOH in a 3000 ml solution. Show your calculation and units.Knowing that the initial volume that you used was 1500 ml. Use this equation to calculate ( CLiOH x VLiOH) before dilution = (CLiOH x VLiOH) after dilution