A solution of potassium chromate of unknown concentration was analyzed against a standard of various concentrations. What is the linear equation of the standard curve from the given data? Table 1. Data for Standard Calibration Curve Potassium chromate 4 Absorbance at 425 nm Standard (mol/Liter) 0.00040 0.100 0.00080 0.301 0.00120 0.478 0.00160 0.787 0.00200 0.989 O y = 431.59x +0.9899 O y = 0.9919x + 0.731 O y = 566x -0.1482 Oy=566x +0.1482 none of the above

A solution of potassium chromate of unknown concentration was analyzed against a standard of various concentrations. What is the linear equation of the standard curve from the given data? Table 1. Data for Standard Calibration Curve Potassium chromate 4 Absorbance at 425 nm Standard (mol/Liter) 0.00040 0.100 0.00080 0.301 0.00120 0.478 0.00160 0.787 0.00200 0.989 O y = 431.59x +0.9899 O y = 0.9919x + 0.731 O y = 566x -0.1482 Oy=566x +0.1482 none of the above

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...

See similar textbooks

Similar questions

Write a discussion on the topic of gravimetric analysis
What types of compounds are NOT applicable to Hinsberg’s test? Give an example.
Show work
Sample # 1 2 0.2425 0.2160 0.2274 Weighed mass of ascorbic acid (g) volume of KIO3 (mL) 18.86 17.91 17.37 0.02459 0.02462 0.02432 [KIO3] (mol L-1) Mean [KIO3] (based on titration) 0.02451 mol L-1 Standard deviation in the mean [KIO3] mol L-1 Confidence limit for the [KI03] mol L-1 Relative confidence limit for the [KIO3] ppt =
Method of Standard Addition Worksheet You are provided a stock standard solution containing : 0.0500 g/250 mL acetaminophin (APAP). You need to determine how much standard stock is required to prepare the following solutions using 100 mL flasks. Flask 12 3 4 [APAP] added ppm (mg/L) t 10 20 30 40 RI mL Stock 0.1 What method of calibration do you use if you are analyzing a product and the product contains no ingredients that interfere with the instrument response for APAP in the product? on th LI What method of analysis do you use if you are analyzing a product and the product contains ingredients that interfere with the instrument response for APAP in the product? or
Fe^3+(aq) + SCN^-(aq) FeSCN^2+(aq) Iron(III) thiocyanate is produced. This species can be determined by colorimetric analysis. Standard Solutions Ee(NO,), 0.0020 M (mL) 5.0 KSCN 0.0020 M (mL) Tube H.O (mlL 3.0 2.0 0.505 5.0 3.0 2.0 0.369 3. 5.0 4.0 1.0 0.265 4. 5.0 5.0 0.0 0.181 1) Make a standard curve fit for this equation and use it to predict 1for an unknown concentration of FESCN 2+: 1.5 10-4 M? 2) What value for T will you expect to read after the solution is at equilibrium? Keq- 206 Fe 3+ initial concentration: 4.12*10-4M SCN- initial concentration: 0.45 10-4
No need to solve anything under the calculations. I've provided it so that the, Explanation question could be answered.
Question 21 of 26 What is the change in enthalpy in joules when 5.44 x 10-4 mol of AgCI dissolves in water according to the following chemical equation: AgCI(s) – Ag*(aq) + Cl-(aq) AH = 65.5 kJ STARTING AMOUNT ADD FACTOR ANSWER RESET *( ) 1 1000 0.001 3.56 х 10° 0.0356 35.6 0.00831 65.5 6.022 x 1023 5.44 x 10-4 g Ag+ J g Cl- mol Ag* kJ mol AgCI g A9CI mol Cl-
What is the molar extinction coefficient at 625 nm for this copper (II) acetate solution? How was it determined? Standard Solution Concentration (M) Absorbance 1 0.025 0.049 2 0.050 0.153 3 0.100 0.242 4 0.200 0.499 5 0.250 0.694
A water sample was analyzed for the total hardness through the reaction between the sample and EDTA. The data obtained from the experiment are presented below (MM CaCO3 = 100.0869 g/mol): What is the ppm? 10,290 ppm 12,390 ppm 11,270 ppm 990 ppm
Question 3 A solution of cupric nitrate of unknown concentration was analyzed against a standard of various concentrations. What is the slope of the standard curve from the given data? Table 1. Data for Standard Calibration Curve Cupric nitrate Standard (mol/Liter) Absorbance at 625 nm 0.00040 0.112 0.00080 0.295 0.00120 0.443 0.00160 0.701 0.00200 0.932 O 0 O 431.59 O none of the above O 0.9899 O 0.00155
I PUIRE UVVIS spectrophotometry of water sample containing cobalt (Co) and nickel (Ni) is performed in a lab. In the beginning, blank reading is taken by taking in the cuvette. A Water only Both A and C Water sample having Ni and Co Co and Ni solution