PLEASE Answer within 20-30 minutes. Thank you! The hardness of water is analyzed using titration. A liter of water sample from tap water found tocontain 135 ppm Calcium. What does the result tells? Which scale of analysis is integrated?Water Hardness (Ca2+)< 60 рpmsoft60-120 ppmmoderately hard120-180 ppmhard> 180ppmvery hardSelect one:O a. Hard Water (Macro - trace Analysis)O b. Moderately Hard (Semi-micro - trace Analysis)c. Hard (Macro - ultratrace Analysis)O d. Moderately Hard (Meso-micro - ultratrace Analysis)

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Answered: The hardness of water is analyzed using…

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter16: Applications Of Neutralization Titrations

Section: Chapter Questions

Problem 16.37QAP

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3. Titration: Strong Acid / Weak Base. (I warned you to be ready!) Here's the cool chart! Analyte: 20.00 mL 0.100 M Hydrazine (N₂H4) Hd A: initial Vertical (Value) Axis Title 0 B: half equivalence C: equivalence 5 10 15 20 Titrant: mL of 0.100 M HCI added 25 20.00 mL of 0.100 M hydrazine (N₂H4, pKb = 5.77) is titrated with 0.100 M HCl. a) Find the initial pH (point A) and the pH at the equivalence point (point C). b) Find the pH at the half equivalence point (point B).
apacit d. The purity of KHP standard was taken as 100% when in actual it was not. Clear my choice A 10.00 ml sample of Y(OH)2 was titrated to the stoichiometric point with 14.50 mL of 0.2345 M H2X. The total number of moles of Y(OH)2 is O a. 0.0034 O b. 0.00469 O c. 0.00034 O d. 0.0068 Clear my choice
2. A 0.5131-g sample containing KBr is dissolved in 50 mL of distilled water. Titrating with 0.04614 M AgNO3 requires 25.13 mL to reach the Mohr end point. A blank titration requires 0.65 mL to reach the same endpoint. Report the %w/w KBr in the sample.
A 0.5131-g sample that contains KBr (MM: 119.0023) is dissolved in 50 mL of distilled water. Titrating with 0.04614 M AgNO3 requires 25.13 mL to reach the Mohr end point. A blank titration requires 0.65 mL to reach the same end point. Report the %w/w KBr in the sample.
- 144 / Natural Sciences / Chemistry And Polymer Science / Chemi zzes / Buffers en Titrasies | Buffers and Titrations A 0.386 g sample of propanoic acid (CH3CH,COOH, K, = 1.3. x 10-5) was dissolved to a final volume of 50.0 cm, This solution underwent titration with 0.32 M NaOH. Calculate the pH of solution at the equivalence point. %3D fi h- Bi ek Please give the answer to 2 decimal places. Ge pl Answer: Check
Content OWLV2 | Online teaching and lee X G How many mlof 0.552 M HI are x A cvg.cengagenow.com/ilrn/takeAssignment/takeCXPCompliantActivity.do?locator-assignment-take CHAPTER 4 - STOICHIOMETRY: QUANTITATIVE INFORMATION ABOUT CHEMICAL REACTIONS Page 1 of 3 Next O A saturated solution of zinc hydroxide, Zn(OH)2. has a pH of 8.7. What is the hydronium ion concentration of the solution? Is the solution acidic or basic? Concentration = M The solution is Cengage Learning Cengage Technical Support
DATA AND RESULTS: Titration Data (Standardization of EDTA) Example II Mass, g Caco, 0.0250 0.0251 0.0246 0.0254 Final reading, mL 25.00 24.91 24.87 25.31 Initial Reading, mL 0.00 0.02 0.02 0.02 Volume, mL EDTA 25.00 Molarity of EDTA, M 0.009992 B. Analysis Data Example II Volume of Sample, mL 25.00 24.90 25.10 25.0 Final reading, mL 27.46 25.08 25.06 24.99 Initial Reading, mL 0.00 0.02 0.02 0.02 Volume of EDTA, mL 27.46 Molarity of EDTA, M 0.009992 Ca" concentration, ppm 440 STATISTICAL EVALUATION OF RESULTS Standardization of EDTA Mean, M EDTA Median, M EDTA Standard Deviation Ci for u at 95% Prob. Level Reported value: M EDTA Ca" Concentration Mean, Ca" ppm Median, Ca" ppm Standard deviation Cl for u at 95% Prob. Level Reported value: Ca" ppm
2- Ahmed has done four types of titrations of 1M and 50 ml for both acid and base (Conductometric Titration of Strong Acid with Strong Base , Potentiometric Titration of Weak Acid with Strong Base , Potentiometric Titration of Strong Acid with Strong Base and Conductometric Titration of Weak Acid with Strong Base ). He plotted the results in curves as shown below. Match between the type of titration and his results 3- Ahmed standardized NaOH (10 ml) with KHP( mass=1 g , MW= 204 g/mol ). Calculate the concentration of standardized NaOH? 4- Calculate pka for a weak acid titrated with strong base using the curve shown below? 14 12- 10- 8 6- 4- 2- 0- 10 20 30 40 50 5- If the solute moved 3 cm in paper chromatography and R, was 0.5. How long in cm the solvent has moved?
5. A 300.0 mg sample containing Na,CO3, NaHCO3 and NaOH and inert material either alone or in some combination was dissolved and titrated with 0.1000 M HCI the titration required 24.41 mL to reach the phenolphthalein endpoint. And an additional 8.67 mL to reach the methyl red endpoint. Determine the composition of the sample and calculate the percent of each titrated component.
5. A 300.0 mg sample containing Na,CO3, NaHCO, and NaOH and inert material either alone or in some combination was dissolved and titrated with 0.1000 M HCI the titration required 24.41 ml to reach the phenolphthalein endpoint. And an additional 8.67 mL to reach the methyl red endpoint. Determine the composition of the sample and calculate the percent of each titrated component.
Answ GA 20. Answ My C X C Write C The F X C Whe x akeCovalentActivity.do?locator=assignment-take [Review Topics] [References) Use the References to access important values if needed for this question. When 25.0 mL of a 1.99×104 M lead nitrate solution is combined with 15.0 mL of a 6.28×10-4 M sodium iodide solution does a precipitate form? (yes or no) For these conditions the Reaction Quotient, Q, is equal to Submit Answer Retry Entire Group 1 more group attempt remaining क Ni ENG US Home End Ins
AaBbCcDdEe AaBbCcDc AaBbCcDdE AaBbCcDdF AaBb A v 三v Emphasis Heading 1 Normal Strong Sub PRE-LAB QUESTIONS 1. Calculate the molarity of a 6.15% (w/v%) sodium hypochlorite (NaOCI) solution. 2. Calculate the molarity of a solution of Erythrocin B (MW 879.9 g/mol) if a 0.5028-g sample is diluted to 100 mL in a volumetric flask and then two serial dilutions are carried out in which 5-mL aliquots are diluted to 100 mL using volumetric equipment. 3. Based on the table, what is the order of reaction for Red Dye #3 and bleach if the following graph gives a straight line: Order of m Straight Line Plot [Red Dye #3] vs time In[Red Dye #3] vs time 1/[Red Dye #3] vs time 1 ates) E Focus 目 MacBook Air

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