Added volume of NE standard (µL) 0 Peak height ratio (NE/DHBA) 12 24 36 48 0.298 0.414 0.554 0.664 0.792

Write a step-by-step procedure for this serial dilution. The stock concentration of the blue dye standard is 1.00 mg/mL. Serial dilution series from the stock standard with the following final concentrations: 500 ug/mL, 250 ug/mL, 125 ug/mL, 62.5 ug/mL. and a blank that is 0ug/ml

A compound “X” is regulated by health Canada at 2 ug/L in drinking water (maximum allowable concentration). What will be the minimum cut-off level of your analytical method to analyze that compound “X”?  How do you determine the cut-off level of your method?

Please don't provide handwritten solution ....

You measure 15.0 mL of the H2C2O4 solution with a 100-mL graduated cylinder and add it to a 125-mL Erlenmeyer flask.  Then you add two drops of the indicator, phenolphthalein, to the oxalic acid solution in the flask.  You dispense the NaOH solution from the buret into the flask (while swirling the flask) until you reach the endpoint.  At the endpoint, the solution in the flask turns light pink.  You repeat the titration two additional times for a total of three trials.  H2C2O4 (aq) + 2 NaOH (aq) --> Na2C2O4 (aq) + 2 H2O (l)                                                (I)              (II)                (III) Volume of H2C2O4 used  15.00 mL   15.00 mL   15.00 mL how many Moles H2C2O4 are used in each trial?

1. A company illegally dumped their wastewater on a river bank. You are part of an environmental NGO that are tasked to determine what kind toxins that may have contaminated the waters. What kind of analysis would you do? a. Characterization analysis b. Qualitative analysis c. Fundamental analysis d. Quantitative analysis 2. Four groups weighed ten rock samples each, and tested the possibility of outliers using Q-test. At 95.0% confidence (a = 0.05), which of the following is considered to be an outlier?  a. 0.024 b. 0.413 c. 0.453 d. 0.674 3. An unknown solution containing oxalic acid, which is a diprotic acid, is titrated against sodium hydroxide. How many mole/s of titrant is needed to react with one mole of analyte?  a. ½ b. ¼ c. 2 d. 4

On their third titration trial, the CHM 111 student used 18.80 mL of 0.205 M NaOH(aq) to neutralize 25.0 mL of HCl(aq). Calculate the molar concentration of the HCl solution to the correct number of significant figures.

List and define the indicators that are used to assess the performance of a specific analytical method under specified conditions.

You were assigned to assay a product sample of milk of magnesia. A 0.600-g sample was reacted with 25.00 mL 0.10590 N H2SO4 . The excess unreacted acid in the solution required 13.00 mL of 0.09500 N NaOH when titrated to reach the methyl red end point. Determine the dosage strength of the product in terms of % Mg(OH)2 content. Type your answer in 2 decimal places, numbers only.

If your first titration yielded a concentration of 0.37 mg/mL and your second titration yielded a concentration of 0.6 mg/mL, what was the average concentration for your two titrations (in mg/mL)? Include the unit and two decimal places in your answer.