exam 1 Ch223 2024 Spring (1)

5. The color change of a chemical indicator requires an overtitration of 0.03 mL. Calculate the percent relative error if the total volume of titrant is a. 50.00 mL b. 10.00 mL 6. From the Gaussian (normal) error curve, what is the probability that a result from a population lies between 0 and +1 σ of the mean? What is the probability of a result occurring that is between +1 σ and +2σ of the mean?

One of the most important applications of ion exchange is the separation of large molecules from small molecules? 1- true 2- Error

A is the snort electran canfiquretiCA Fe2+

I need help please!!

Only Part B, A is right.

Determine the Vmax

How do I solve this?

3. The following mineral analysis was reported for a water sample taken from a local NJ well. Determine the total, carbonate and non-carbonate hardness in mg/L as CaCO3. Well No. 1, Lab No. 02694, November 9, 1971 Iron 0.2 Silica (SiO2) 20.0 Manganese 0.0 Fluoride 0.35 Ammonium 0.5 Boron 0.1 Sodium 4.7 Nitrate 0.0 Potassium 0.9 Chloride 4.5 Calcium 67.2 Sulfate 29.0 Magnesium 40.0 Alkalinity 284.0 as CACO3 Barium 0.5 pH 7.6 units Note: All reported as "mg/L as the ion" unless stated otherwise. Ca2 Alk Non

2H+ (aq) + Sn(s) → H₂ (9) + Sn²+ (aq) 2H+ (aq) + 2e → H2 (9) Ere = 0.000 V Sn2+(aq) + 2e → Sn(s) Eve = -0.140 V red Hint: Carry at least 5 significant figures during intermediate calculations to avoid round off error when taking the antilogarithm. Equilibrium constant at 298 K: AGº for this reaction would be [ than zero.

Ba(NO,l(aq) + K,SOlaq) Baso(s) + 2 KNOlaq) Volume Volume Trial 0.10 M Ba(NO)2 (ml) 0.10 M K,SO, (ml) Mass Baso4 (s) Limiting Reagent 50. 20. 0.46 50. 40. 0.92 3 50. 50. 1.15 4 50. 60. 1.15 50. 80. 1.15 • Question 8 Use the data to identify the limiting reagent for each reaction performed. V Trail 1 a. Neither/Both EV Trial 2 b. Baso4 EV Trial 3 C. KSO4 EV Trial 4 d. Ba(NO3)2 EV Trial 5 e. KNO3 Question Help: Message instructor I Calculator Submit Question • Question 9 Why is the amount of precipitate in the Data Table above the same in Trials 3 through 5? Edit Insert Formats B IVX x' A

BOXES D-F box d answer choices: info from neither part a nor part b, info from both part a and part b, info from part a only, or info from part b only. box e answer choices: sp^3, sp^3d^2, dsp^2, or d^2sp^3. box f answer choices: paramagnetism, animalmagnetism, diamagnetism, or ferromagnetism.

HDPE and PS are both inert to bases and acids, which plastic would you rather chose to put 1 Liter of 6M HCl for general chemistry lab? Explain why.

0.2 to 1.0 mg/ml: For each concentration, a volume of 1.0 mL should be prepared. How will you prepare these standards using micropipettes and which one would you use? There is a: 0,5-10 microliter pipette; 2-20 microliter pipette 20-200 microliter pipette 100-1000 microliter pipette.

If the cells were spread out into a thin layer that was a single cell thick, what would be the total surface area ( in square meters) for the top side of the cell layer ? Be sure your answer has the correct number of significant digits? ……m^2pls help me

Chemistry Fraction no. Elution Vol. (mL) Abs                      (λ = 410)   Fraction no. Elution Vol. (mL) Abs   (λ = 410) 1 (PB pH 6.0) 1 0.0050   11 11 0.0041 2 2 0.0032   12 12 0.0060 3 3 0.0040   13 13 0.0064 4 4 0.0064   14 14 0.0063 5 5 0.0067   15 15 0.1109 6 6 0.0067   16 16 2.8902 7 7 0.0050   17 17 0.8500 8 (PB pH 8.0) 8 0.0049   18 18 0.2019 9 9 0.0052   19 19 0.0378 10 10 0.0050   20 20 0.0073 Use the data above to plot an elution profile, in which the absorbance is on Y-axis, and elution volume (volume = fraction number) is on X-axis. The elution profile must indicate at (1) which point the pH change occurred, (2) the fraction(s) which contain the highest myoglobin content, and (3) the maximum absorbance detected.

The first image is the problem and the second image is alek data to slove the problem. I been having a hard time figuring out how to slove this problem.