Five categories of primary drinking water standards are
Project: Fluoride in our Drinking Water 1. What are the standards for fluoride in tap water, fountain water, and DI water? 2. Is this technique (ion-selective electrodes to quantify fluoride) a good one for a quantitative analysis of fluoride in water? Explain your reasoning. 3. Can you think of other methods that might work to analyze fluoride content in water?
water treatment plants must meet all EPA drinking water standards .how might a water treatment plant remove iron from drinking water safely ? give 3 possible removal methods (can same method but different chemicals ). choose which method is best and reasoning for this
What are you drinking? Environmental Protection Agency standards require that the amount of lead in drinking water be less than 15 micrograms per liter. Ten samples of water from a particular source have the following concentrations, in units of micrograms per liter. Assume the population standard deviation is o = 4. If appropriate, perform a hypothesis test to determine whether you can conclude that the mean concentration of lead meets the EPA standards. Use the a-0.01 level of significance and...
What are you drinking? Environmental Protection Agency standards require that the amount of lead in drinking water be less than 15 micrograms per liter. Ten samples of water from a particular source have the following concentrations, in units of micrograms per liter. Assume the population standard deviation is o = 4. If appropriate, perform a hypothesis test to determine whether you can conclude that the mean concentration of lead meets the EPA standards. Use the a-0.01 level of significance and...
We need five working standards covering the range between 50.0 and 500.0 ppb Pb2+ for the analysis of Pb in drinking water. A stock solution of Pb2+ was made by dissolving 0.1588g of Pb(NO3)2 in distilled water and dilute to 100 mL mark of volumetric flask. How should we make these working standards? Hint: Since the target concentrrations are so low here, you may use a dilution ratio of 1 to 1000, i.e., 1mL to 1000mL
if drinking water has a ph of 9.33 what is the water hydronium ion concentration
What are the five major categories of fraudulent disbursements? Pick two of the categories and describe: a. How the fraudulent disbursement occurs, b. Three red flags associated with the fraudulent disbursement category: C. Three methods used by forensic accountants to detect the fraudulent disbursement.
Treating Drinking Water Phosphate can be removed from drinking-water supplies by treating the water with Ca(OH)2. How much Ca(OH), is required to remove 90% of the PO43-from 4.5 × 106 L of drinking water containing 25 mg/L of PO
2. An analyst is measuring cadmium in drinking water using Atomic Absorption Spectroscopy. The analyst prepares a set of calibration standards between 1 ppb and 50 ppb. The calibration curve is linear between these concentrations and the linear least squares equation is y=0.0127x + 0.0710. The analyst then runs a set of 4 drinking water samples. a) [What kind of standardization was used for this calibration curve: standard addition, internal standard, or external standard?] b) For sample 1, the analyst...
Exercise 18 Reflection Questions 1. What is the significance of detecting E. coli in drinking water? 2. List 5 characteristics of coliform bacteria. 3. Describe the appearance of coliforms on M-endo broth. 4. Is the water that passed through the filter sterile? Explain. 5. Explain why the standard for municipal drinking water is different that the standard for private drinking water.