Q: Concentration of TZ stock solution (μMμM) 42.06
A: Given Data:Concentration of TZ stock solution (μM)42.06To determine:
Q: The calcium ion binds to a certain protein to form a 1:1 complex. The following data were obtained…
A:
Q: Complete the flow diagram below for Group A analysis. (Submit answers on Canvas assignment) For each…
A: Step 1: Step 2: Step 3: Step 4:
Q: Part C Fe(NO3)(ag) and HCl(ag) Express your answer as a balanced net ionic equation. Identify all of…
A: The Net ionic equation for these two chemical reactions can be written as -
Q: A chemist received a radioactive sample that is suspected to contain U, 23U and other elements. The…
A: The objective of this question is to show the surface analysis technique for this sample is X-ray…
Q: Sample Physical Appearance 0.1 M Na2CO3 0.1 M CaCl2 Na2CO3 + CaCl2 mixture…
A: It is given that 0.1 M sodium carbonate (Na2CO3) is reacting with 0.1 M calcium chloride (CaCl2),…
Q: Which activities are likely to cause contamination of stock chemicals in the laboratory? pouring out…
A: When the stock chemicals get contaminated by some activities then, the activity of the chemicals…
Q: Log Koc = 2.36 for the pesticide Carbaryl. Rainwater percolating down through the soil contains 5…
A:
Q: ticides. Which pre-concentration method do you suggest to extract these compounds from the tomato…
A: Dispersive "liquid–liquid micro extraction" (DLLME) technique was used to extract the…
Q: ** vi CI 10 Desulfovibrio vulgaris 6. SR humic acid? hematite $ 6 7 pH 3 4 8 9 10 Fig. 7-12.…
A:
Q: You will write an informal procedure in your lab notebook, and after lab, write a written procedure…
A: In an informal procedure written in a lab notebook, you typically include the steps necessary to…
Q: ▪ What are two methods of extraction - A)liquid-liquid, Solid Phase Extraction B)solid-solid, Gas…
A: There are many methods of extraction which are used in extraction process like solid -phase…
Q: A sample of a soil was analysed for K+ as follows. A 2.50 g sample of soil was dissolved in acid and…
A: Thus in 50ml diluted solution , 9.81 ppm K+ is found. Thus 50ml diluted solution, Amount of K+ =…
Q: A solution that is 0.20 molar in monomer and 4.0x10-3 M in a peroxide initiator is heated to 60 °C.…
A:
Q: Graph data with Concentration on the x-axis and Absorbance on the y-axis. Find the line of best fit…
A: A question based on analytical chemistry.. Using the given data, the line of best-fit of the graph…
Q: Part A Nitric acid is a component of acid rain that forms when gaseous nitrogen dioxide pollutant…
A: Acid rain is the rain having a pH value of less than 7. Acid rain arises when the pollutants like…
Q: A compound “X” is regulated by health Canada at 2 ug/L in drinking water (maximum allowable…
A: The cut-off level of an analytical method is the minimum concentration of a substance that can be…
Q: Classification of Compounds Chemical System Intensity of Light Classification Distilled water…
A:
Q: K++HCO−3+H++NO−3→K++HCO3−+H++NO3−→ Express your answer as a net ionic equation. Enter noreaction if…
A: The reactants given are 1) KHCO3 (aq) 2) HNO3 (aq)
Sketch and annotate a flow diagram to illustrate a suitable
Step by step
Solved in 3 steps with 1 images
- OSHA's Hazard Communication Standard requires chemical manufacturers to evaluate hazards relating to their products and provide a Safety Data Sheet in accordance to the Globally Harmonized System (GHS) in which the use of pictograms (see Figure 1) is required to communicate hazard information. Predict (with reasons) two (2) hazards related to each of the two activities below, and assign two (2) relevant pictograms listed in Figure 1 to each of the two activities. Activity 1: Removing diethyl ether (last opened in 2019) using a rotary evaporator. Activity 2: Using carbon monoxide gas as a reducing agent to reduce iron chloride. Figure 1. Pictograms advised by the Globally Harmonized System for communication of chemical hazards.PAPER CROMATOGRAPHY • Define chromatography • Demonstrate an understanding of the process of chromatography • Describe the steps involved in a chromatography investigation Explanation Coloured inks are often made up of several different inks. Each colour of ink will get carried a different distance by the water, allowing you to see all of the different inks. Try this with different colours to see what actually goes into a colour. This technique is called chromatography and can be used in chemistry to find out what is in an unknown mixture. II. Materials .Felt tip pens (non-washable) . Kitchen roll .A bowl or cup . Water • Scissors III. Health and safety • Make sure that you thoroughly clean any equipment after the experiment before using for food IV. Procedure Method 1 1. Take a sheet of kitchen roll and draw a simple picture with a non-washable felt tip pen. 2. Place the sheet over an empty bowl. This is to keep the paper from getting too wet. 3. Carefully add a few drops of water…Analytical chemistry is a particular field within the broader spectrum of the chemical sciences, in which many times the focus of analytical experiments is to develop new methods to analyze compounds, either structurally or by determining concentrations of compounds. One of the processes analytical chemists use to determine the exact concentration of a working solution is called standardization. In your own words, describe the differences between a primary, secondary, and tertiary standard, and describe the underlying concept behind the standardization process. Why is it done?
- With the knowledge on analytical separation and analyses, outline a suitable analytical separation protocol that can be employed to recover polluted river bodies and make them wholesome for drinkingRefer to Figure 1 and answer the following questions: (i) (ii) Pictograms are symbols used in Global Harmonized System (GHS) to make hazard communication more effective. Use one key word to describe the meaning of Pictogram 1, 3, 4, 8 respectively. Provide an example of chemical compound for each. Assign relevant pictograms to the following activities. Activity 1: Heating sodium chloride with concentrated sulfuric acid Activity 2: Preparing aqueous sodium borohydride in a closed glass vessel Activity 3: Adding diethylene glycol to potassium permanganate solid 1 4 2 5 3 6 th 7 8 9 Figure 1. Pictograms under GHS system.II. b) What is the difference between liquid-liquid, solid-liquid and solid-phase extraction? Complete the table below and sort the following examples in the correct column: Steeping tea, washing an organic phase (workup), brewing beer, chemical desalting of crude oil, activated carbon sugar decolorization. liquid-liquid solid-liquid solid-phase Phase that contains analyte before extraction? Phase that contains analyte after extraction? Example(s)
- Suppose a group of students put 2.92 grams of an unknown solid acid into a 250-mL volumetric flask and filled it up to the mark with deionized water. After this they pipetted out 15.75 mL of a 1.78 M NaOH(aq) solution into another 250-mL volumetric flask and filled it up to the mark with deionized water. The students were given a pH meter that was already calibrated by their teaching assistant (T.A.) and they got the following result shown in the table below. Calculate the Molarity of the unknown solid acid. Hint: You can approximate the endpoint of the titration by taking the average volume between two consecutive titrant volume reading and you can assume that it is a 1:1 stoichiometry ratio between the acid and OH-(aq). VNaOH (mL) pH VNaOH (mL) pH 0 1.97 15 3.43 1 2.05 16 3.57 2 2.12 17 3.65 3 2.20 18 3.77 4 2.29 19 3.88 5 2.38 20 4.01 6 2.47 21 4.23 7 2.58 22 4.65 8 2.69 23…Solution 1 Solution 2 Solution 3 Solution 4 Solution 5 Concentration iron(III) nitrate 0.00200 0.00200 0.00200 0.00200 0.00200 [Fe(NO3)3] (M) Concentration potassium thiocyanate 0.00200 0.00200 0.00200 0.00200 0.00200 [KSCN] (M) Volume Fe(NO3)3 (mL) 5.00 5.00 5.00 5.00 5.00 Volume KSCN (mL) 5.00 4.00 3.00 2.00 1.00 Volume DI water (mL) 0.00 1.00 2.00 3.00 4.00 Initial concentration [Fe3+] (M) 0.00100 0.00100 0.00100 0.00100 0.00100 Initial concentration [SCN] (M) 0.00100 0.000800 0.000600 0.000400 0.000200 Absorbance 0.269 0.192 0.154 0.104 0.052 Equilibrium [FeSCN2+] (M) 0.000198 0.000141 0.000113 0.0000765 0.000038 Equilibrium constant Kc Average KcWhat are the criteria for a successful determination in gravimetric analysis?
- Please give information about these chemicals.professor Scimemi has accepted you as a Master’s student and you are involved in a project that studies the cellular basis of neuropsychiatric diseases. For your electrophysiology recordings you have to make a recording solution containing (in mM): 119 NaCl, 2.5 KCl, 2.5 CaCl2, 1 MgCl2, 26.2 NaHCO3, 1 NaH2PO4, 22 glucose. You need 800 ml of it. How much KCl do you need to weigh out? Hint: we only care about KCl here. (MW KCl is 74.55 g/molWhat application of CHNS elemental analysers can be suggested in Food Analysis Give examples for it and explain its importance