Experiment 10 Water Info PDF

Is it acceptable to recycle the containers of hazardous chemicals? Why or why not? Explain your answer within the context of chemical safety.

Write your complete solutions on yellow paper, round your answers to the appropriate number of significant figures, and box the final answer. The deadline for submission is at the end of the class. Note: You do not need to write your solutions for the items that can be derived from your calculators. 1. Three students (Saerom, Hayoung, and Jiwon) are asked to determine the ppm Ca in a drinking water sample by titration with EDTA. Each student performed five trials for the sample. The results in ppm Ca are the following: Saerom Hayoung Jiwon a. Get the mean, SD, and % RSD of each student's results. b. If the true value is 35 ppm, calculate the relative error of each student's results. c. Comment on the precision and accuracy of each student's results. The maximum % RSD and the relative error set by the lab is 5.0%. d. Use the following table to summarize your answers. Mean SD %RSD Relative Error Comment 31, 32, 33, 33, 32 35, 34, 34, 35, 34 35, 38, 33, 35, 37 Saerom Mean SD 95% CI…

Look for the following two things about water treatment (not wastewater). for each, Q1 1. One of the common chemical pollutants removed from water during water treatment. How is it removed and why? Include chemical formulas and chemical reactions. Q2 2. One chemical substance added to water during water treatment. How is it added to water and why? Include chemical formulas and chemical reactions.

1) In lab you are given 4 bottles, each containing about 5 grams of a white substance. Near the bottles are four labels indicating each bottle contains a high purity substance. Assume these labels belong to the bottles and that each bottle contains a single substance.   The four bottles contain glucose (C6H12O6), sodium chloride (NaCl), aluminum oxide (Al2O3), and zinc sulfate (ZnSO4).   Using your knowledge of solubility rules and electrolytic behavior, describe tests that you could conduct to determine which label belongs to which bottle. For these tests you may only use DI water, an aqueous solution of barium nitrate, and a conductivity tester to identify the substance in each of the bottles. Give the results you would expect for each test.

purses/58591/days/1492616/assessments/623504/variants/623504/take/25/ Question 24 Which is the best description of the regulation goals set forth by the Kyoto protocol of 1997? A a suggestion to car manufacturers to develop less-polluting vehicles a mandate for industries to use air pollution control devices, such as scrubbers and electrostatic precipitators a goal set to decrease the carbon dioxide (CO2) emissions from anthropogenic activity, with a focus on stopping the rise of global temperature a goal and promise to make efforts to reduce greenhouse gas emissions

123

Write dimly, brightly, not at all to the intensity and classify what kind the chemical is depending on its electrical conductivity

Based on this. What was the percentage error in the percentage of water in the sample, compared to pure MgSO4•7H2O?

Can you help me answer this type of question from my study review package please

Determine the % water content of the popcorn kernels. Show complete solution.

Dilution means adding water to something so that the ratio of solute to solvent is less than in the original solution. Some people say, “Dilution is the solution to pollution.” Do you think this statement true? Could you ever add enough water so that there would be no drink mix—that the water would be the same as in cup #6, pure water? Do you think you could you ever add enough water to a pollutant to make it disappear completely? Why or why not?

** I have been studying for a chemistry exam and this is a sample lab that I have off of YouTube. Hoping you can give me some sort of answer key. Thank you. The video is called “Performing a Dilution” on YouTube and answer the following questions 1. What materials (e.g. glassware) are required to perform a dilution? 2.list the steps followed to perform a proper dilution. Include all tips mentioned in the video 3. Why should you never use your mouth for drawing solutions up into a volumetric pipette?

Calculations. Show all calculations, formulae and units below; and give your final answers to the appropriate number of significant figures. 1. Determine the concentration of a diluted solution if 10.00 mL of the standard solution prepared in Part I is diluted to a final volume of 250.00 mL.

A chemist prepares a solution of iron(II) bromide (FeBr,) by measuring out 1.1 x 10" µmol of iron(II) bromide into a 150. mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in mol/L of the chemist's iron(II) bromide solution. Round your answer to 2 significant digits. mol x10 Continue Submit Assignment 2021 McGraw Hill LLC. All Rights Reserved. Terms of Use Privacy Center Accessibility I'm We %23 $ % & 3 4 5 6 7 8 R

Before slow cooking a meat (for example, in a crockpot/slow-cooker) you will often find instructions to sear the meat on high heat in an oiled skillet for a few minutes before transferring it to the crockpot. The searing is brief – not long enough to cook the meat thoroughly. Despite myth/legend, the searing will not “seal in the juices”. What is the searing for?

View Assessment ← C Pri Ter Acc X 13 minutes remaining Question 1 blackboard.matc.edu/ultra/courses/_525703_1/outline/assessment/_1556 Blank 1 X Blank 2 Blank 3 All answers must have the correct units. Watch your significant digits! A 55.0 g sample of sugar (C12H22011) is dissolved in 170. g of water. a. What is the mass of the solute? Blank 1 g b. What is the mass of the solvent? Blank 2 g c. What is the mass of the solution? Blank 3 g d. What is the percentage by mass of this solution? (% m/m) Blank 4 % Blank 4 Add your answer Add your answer Add your answer Add your answer Courses Last saved 12:59:40 PM X Questions Filter (6) ▼ + K First < Previous Next

it's homework not exam

I need help on questions 1-2? If you can't help me on question 2, then you can help me on question 1.

FINAL Experiment 1- January 2021_-789644623 - Saved Layout Review View Table A friend of yours went panning for gold last weekend and found a nugget that appears to be gold. With your newfound scientific prowess, you set out to determine if it is really gold. Your tests show that the nugget has a mass of 7.6 g. Immersing the nugget in water raised the volume from 7.22 mL to 8.06 mL. The density of gold is 19.32 g/cm3. What will you tell your friend? acer

1a. Throughout the experiment, what are some possible sources of error that could have led to someone recovering a significantly smaller amount of table salt (NaCI) than was originally present in the sample mixture. 16. What are some possible sources of error that could have led to someone to appear to have recovered a significantly larger amount of sand (SiO2) than was originally present in the sample mixture.

Here is a graph of the molarity of acetonitrile (CH, CN) in a reaction vessel during a certain chemical reaction. Use this graph to answer the questions in the table below. у 0.30- 0.25- 0.224 0.20 M 0.15– 0.10- 0.05 50 100 150 200 250 300 seconds

Greenwashing is a major problem. Companies will say they are using practices that benefit the environment while really not taking any steps to do so. An example is Terracycle - a company that is supposedly able to recycle non-recyclable plastics and by-products - but which went over a year without collecting products from any of their customers. How can consumers navigate the labels to determine if products are actually sustainable.

Balance each of the following neutralization reactions. Part A HNO, (aq) + Sr(OH)2(s)→H20(1) + Sr(NOs)2(aq) Express your answer as a chemical equation. Identify all of the phases In your answer. ΑΣφ ? DA chemical reaction does not occur for this question. Submit Request Answer t Speec.pdf

Based off information from the attachment, please help with #13 on second attachment

Which of the following given statements is false? 1. The electrical conductivity of water is dependent on the temperature of the water sample. Removal of suspended particles by sedimentation depends upon the size and specific gravity of those particles. Suspended solids retained on a filter may remain in suspension if their specific gravity is similar to water while very dense particles passing through the filter may settle. Sodium hydroxide and sodium chloride are both bases. 2. In a sedimentation process, the solid particles settled at the bottom of the container because they are heavier than water and are acted upon by gravity. In the process of distillation, the condenser helps in the conversion of the vapor that goes inside it into liquid. After filtering a mixture using a filter paper, there is more solute at the bottom of the container compared to the contents of the filter paper. In the reaction between dry ferrous sulfate and dry potassium ferricyanide, no change is observed.…

List the common steps taken in treating water for a public water system?