Experiment 9 Report Forms gg

I need help on questions 2-8?

I need help on questions 2-7?

Name Lab Instructor Date Report Sheet Experiment 6 Determining the Formula of an Unknown Hydrate A. Identification of True Hydrates Water Color Color of True Color of solution before heating Compound hydrate after adding (Yes/No) droplets of the solution after residue after water to the heating (Yes /No) heating residue Nickle(II) chloride Sucrose Cobalt(II) chloride Potassium chloride

Did the control experiment verify or refute the results from Exercise 1? Use the results from Exercise 1 and 2 to validate your answer. (Experiment 1 is exercise 1)

Please please solve exact amd accurate answers please this is important and please solve all sub-parts I'll rate it up thanks.

yout References Mailings Review View rt Endnote t Footnote ✓ w Notes es 5 Search Researcher Absorbance 5 4.5 4 3.5 2.5 2 1.5 1 0.5 0 Research 0 Insert Citation 1 1. Construct a standard curve in Excel by plotting concentration (in ppm) on your x-ax (unitless) on your y-axis for your known solutions. Label the axes on the graph and provi title. See Figure 5 in the lab handout for an example. Use a linear trendline to generate a data. Label the graph with the equation and the R2 value. Insert your labeled graph in the Help Manage Sources Style: [APA 2 Bibliography Citations & Bibliography Sciwheel Nitrate Standard Curve 3 4 ty=0.8842x-0.8191 R²=0.9509 Q..**. Concentration Insert Caption 5 6 Insert Table of Figure Update Table Cross-reference Captions ww 7 2. Using the equation from your graph, determine the nitrate concentration (in ppm) in each of samples. Text Predictions: On Accessibility: Investigate O Search 8509 FORGE *

please help me find concentration   Concentration of TZ stock solution (μMμM) 42.06

5mL of NaOH

NaOH is the base (please elaborate) Thank you!

Answer number 9

Determination of unknown acid concentration     Trial 1 Trial 2 Trial 3 Unknown Acid number Volume of acid used (mL) 25 mL 25 mL 25 mL Initial buret reading (mL) 50 mL 50 mL 50 mL Final buret reading (mL) 14.8 mL 15 mL 14.5 mL Volume of NaOH used (mL) 50 mL 50 mL 50 mL Molarity of NaOH       Calculated molarity of HCl (M)               Show a sample calculation of HCl molarity   AVERAGE MOLARITY OF Unknown HCl Show a sample calculation of NaOH molarity

Based on the data given answer questions. 1,3, and 5 please ?? Question 2 is already answered to solved 1 and 3 1. Based on your three trials, discuss the precision of your data 2. The actual concentration of the unknown is 0.200 M. (Check with instructor to ensure that this value is accurate.) Calculate the percent error based on the average molarity of your three trials. Answer: Actual Molarity= 0.200M Mcalculated = 0.1755M % error = ( [actual - calculated value]/actual ) *100 Putting values; = ((0.200 - 0.1755)/0.200 )*100 = 12.25% 3. Based on your answer to (2), discuss the accuracy of your data. 5. 80.0 mL of 0.30 M NaOH and 80.0 mL of 0.30 M HCl are mixed together. What is the approximate pH of the solution —acidic, basic, or neutral? Explain.

How do I complete table 4 with the date given in table 3?

I need help finding the molarity of NaOH for run 2-4. I know the molarity for run one was 0.300M and that I have to use the M1V1=M2V2 formula but I don't know how to solve for it. I included the procedures we followed to make each dilution solution.

I Review | Cor Submit Previous Answers Correct Part C 4 mol B ΑΣφ JAH| = kJ Submit Request Answer Part D

Result/conclusion Using the image attached please write • molar mass, pKa, % error • Sources of error • Sequence followed Please please please answer as fast as possible

I need help with question 5? I am confused on question 5a and what it means?

Pre Lab Questions: (Each answer is to be written as a complete sentence) What is the reason for washing the precipitate with water in Step 9? Define precipitate. Define filtrate. In Step 2, what is the purpose for rinsing the stirring rod? read the Procedure to answer the questions  Using a balance, mass between 1.50 – 2.00 grams of sodium carbonate in a pre-massed 150mL beaker. Add 20 mL of distilled water and stir thoroughly to make sure all the crystals are dissolved. Rinse the stirring rod with a little distilled water after stirring. Using a balance, mass between 1.50 – 2.00 grams of calcium chloride dihydrate in a pre-massed 50 mL beaker. Repeat Step 2 for the solution in the 50 mL beaker. Pour the calcium chloride solution into the 150mL beaker containing the sodium carbonate solution and stir. Mass a piece of filter paper. Fold the filter paper and place it into the funnel. Wet it with a little distilled water to ensure that it is stuck to the sides of the funnel. Slowly…

Do not give handwriting solution.

Determination of known acid concentration     Trial 1 Trial 2 Trial 3 Volume of acid used (mL) 25 mL HCl 25 mL HCl 25 mL HCl Initial buret reading (mL) 50 mL 50 mL 50 mL Final buret reading (mL) 30 .7 mL 31.1 mL 29.3 mL Volume of NaOH used (mL) 50 mL 50 mL 50 mL Molarity of NaOH       Calculated Molarity of HCl   Show a sample calculation of HCl molarity   Average concentration of HCl from Trials 1,2, and 3   The “true” concentration of HCl is 0.10 M. The calculated average concentration of HCl is ______________M. The % error is = (???? − ?????)/????? ? 100

Table 1. Emulsion Formation Emulsion has formed (Yes or No) NO es 1. From the results in Table 1, can you say that the soap is an emulsifying agent, a substance able to cause nonpolar and polar substances to mix? How did you reach your conclusion? Fron Sample Water Water plus oil Water plus oil plus soap Hydrophilic head LAB WORKSHEET- Experiment 11 Ester Hydrolysis and Soap Making Na 0. No. of Layers Cloudy or Clear Clear Clear cloudy 2 2 water is t 2. The products of the saponification reaction you performed were fatty acid sodium salts and glycerol. Shown below is a long chain fatty acid sodium salt. The molecule is amphiphilic because it has a polar end (hydrophilic head) and a nonpolar portion (hydrophobic tail). HO Hydrophobic tail is able a) What part of the molecule interacts with water? Polar bond interacts w/water CH3 b) Which part of the molecule interacts with a nonpolar substance like grease? nonpolar interacts w/ grease 32

Using this set of data, what should the trendline of my graph look like?

Now that you know the moles of NaOH used for each trial as well as the volume of NaOH used for each trial, calculate the concentration of the NaOH that you made in lab for each trial.  Round to the ten-thousandths place please.

If an analytical method relies on a measurable property of an analyte that can be correlated with the amount of the said analyte, what type of analytical method is it?   Oxidative methods   Instrumental methods   Blank Correction methods   Classical methods

HP TrueVision HD 4 Texas Workfor Mộc Homework × W. College Physic mical App AN Careers eagleonline.hccs.edu/courses/188795/assignments/3601808 valnabie diler reD 4 dl 10.1Tam Constants | Periodic Table Part O Complete the fourth row. Complete the following table by calculating the missing entries and indicating whether the solution is acidic or basic. Express your answer using two decimal places. Acidic or [H+] [OH-] pH pOH basic? 7.4x10-3 ΑΣφ 3.3x10-10 M pH 8.25 5.73 Is to fa ho II 10 insert

LabQuest 17 DATA TABLE Trial 1 2 3 4 5 6 Concentration (mol/L) 0.080 0.16 0.24 0.32 0.40 Unknown number Absorbance (no units) 0.2711 0.437 1.480 1.932 2.171 0.3 DATA ANALYSIS 1. Describe an alternate method for determining the molar concentration of your unknown sample of copper (II) sulfate solution, using the standard data.

Assignment Score: 45.9% Question 12 of 19 What concentration of CI re [CI¯] =

Calculate the volume of NaOH used in each trial. Use sig figs.