A- STANDARD PHOSPHATE SOLUTION: Standard solution 1 4 6. Conc of PO4 (ppm) O-00 O.2 0.4 0.6 0.8 1-0 Absorbance 0-00 O0 33 0:069 O-107 0.134 0.155 B - UNKNOWN WATER SAMPLE: Unknown Water Sample Number: Absorbance reading: 0.083 Calculated Concentration (P04"): CALCULATIONS Set each problem completely and SHOW UNITS. Cancel the units when you do the up calculations. Use the correct number of significant figures in your answers. 1. Determine the ppm of Phosphate in your water sample. by us Inconcent

A- STANDARD PHOSPHATE SOLUTION: Standard solution 1 4 6. Conc of PO4 (ppm) O-00 O.2 0.4 0.6 0.8 1-0 Absorbance 0-00 O0 33 0:069 O-107 0.134 0.155 B - UNKNOWN WATER SAMPLE: Unknown Water Sample Number: Absorbance reading: 0.083 Calculated Concentration (P04"): CALCULATIONS Set each problem completely and SHOW UNITS. Cancel the units when you do the up calculations. Use the correct number of significant figures in your answers. 1. Determine the ppm of Phosphate in your water sample. by us Inconcent

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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tGPT translate Google Search X C Which of the statements bel X oads/att.epCqDCR-ol0GROgrwWy0F2UVDmra3oKTRAHPREHOKQ.pdf OKTRAHPREHOKQ.pdf 20/60 150%+ 15. Njehsoni pH e një tretësire 0,010 M CH3CO2H. Ka = 1,8 x 10-5 për acidin acetik. A) 9.26 B) 3.39 C) 2.02 D) 10.61 E) 4.74 Përgjigje: B 16. Njehsoni fortësinë jonike të një tretësire 0.210 M FeCl2. Përgjigja: 0.630
Determining the Acid Content of Vinegar Calculate % (w/v) acetic acid of trial A, B, and C NOTE: molarity: 0.09912 (trial A), 0.09945 (trial B), 0.09901 (trial C)
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Name: Date: Section: Report Sheet: Determination of Molecular Weight Through Freezing Point Depression Analysis 30 Part A: Volume of Cyclohexane mL Mass of cyclohexane (d =0.7786 g/mL) 6.0 °C Freezing Point of cyclohexane 128 Part B: Molecular Weight of Naphthalene g/mol 0.23 Mass of Sample 1 Moles of Sample 1 Mass of Sample 2 0.18 Moles of Sample 2 Moles m (mol/kg solvent) T,('C) AT, Naphthalene 5.1 TRIAL 1 5.3 TRAIL 2 k, Cyclohexane CC/m) Part C: Unknown Number 0.21 0.19 Mass of Sample 1 Mass of Sample 2 Grams Unknown T,('C) AT 0.21 4.8 TRIAL 1 0.19 5.0 TRAIL 2 Moles UnknownTRIAL 1 (moles) TRIAL 2 (moles) TRIAL 1 (g/mol)TRIAL 2 (g/mol) Molecular Weight Unknown (g/mol) AVERAGE MOLECULAR WEIGHT OF UNKNOWN
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d. 9.2 x 10-1 M, acidic e. 9.2 x 10-1 M, basic Calculate the freezing point of a solution of 300.0 g of ethylene glycol (C2H602) dissolved in 300.0 g of water. Kf = 1.86°C/m and Kp = 0.512°C/m. %3D %3D Select one: a. 30.0°C b. -30.0°C O c. 8.32°C d. -8.32°C e. 70.2°C Give the direction of the reaction, if K >> 1. Select one: a. The forward reaction is favored. b. The reverse reaction is favored.
An aqueous solution at 25 °C has a H,0 concentration of 6.7 ×10 M. Calculate the OH concentration. Be sure your answer has 2 significant digits. -8 M x10 2022 McGraw Hill LLC. Al Rights Reserved. Terms of Use Privacy Center Accessibility 7:11 AM I Don't Know Submit 47/2022 W 80 F Cloudy DELL PgUp PgDr Delete PrtScr Insert F11 F12 F10 F9 F8 F6 F7 Num F5 F4 Lock F3 F2 Backspace F1 Esc & %3D Fn # * 00 %24
Be sure to answer all parts. Calculate the concentrations of all the species in a 0.145 M Na,CO3 solution. For H,CO3, Ka1 = 4.2 x 10- and Ka2 = 4.8 × 10-11. [CO,?] =| [Na*] = M M %3D [HCO3 ]=| M [OH] M [H2CO3] = x 10 M [H*] = х 10 M %D (Enter your answer in scientific notation.) (Enter your answer in scientific notation.)
The molar solubility of Iron(II) hydroxide in a water solution is 30 F3 Submit Answer $ 4 R F % 5 Retry Entire Group 9 more group attempts remaining Cengage Learning Cengage Technical Support F5 G A 6 MacBook Air Y H & 7 A U * 00 8 J ► 11 F8 1 9 ➤➤ K ded for this question. O V 1 0 M. F10 P 1 A Previous F11 { = 1 Next> Save and Exit ? 11
Provide full complete solution do not round off numbers and show proper labelling and cancellations
What volume (in mL) of a 15.0 M stock solution of aqueous sodium chloride is required to make a 324.0 g 0.75 M solution
*Record final buret volume and volume of NaOH in Lab Data *Calculate molarity of acetic acid in vinegar solution. Record concentration in Lab Data