Need question 1,2,3 **Educational Website Content: Analytical Chemistry Practice Questions**---### Practice Questions on Analytical Chemistry1. **Which statement is not a good practice during weighing in an analytical balance?** - _Chemicals should never be placed directly on the weighing pan._ - _Close the glass door of the balance before reading._ - _Hot samples can be weighed on the balance at any temperature._ - _Use tissue paper to place objects on the balance._2. **Before using a clean 25 mL pipet in an experiment, what operation should you perform?** - _Calibrate the pipette with D.I. water using an analytical balance for weighing._ - _Clean the pipette again and start using it._ - _Calibrate the pipette with an acid solution of unknown density._ - _Calibrate the pipette with D.I. water using a technical balance for weighing._3. **Knowing what you know about systematic and random errors, which error source is not a "correctable" source of error in a volumetric titration?** - _Overshooting the end point._ - _Having air bubbles in the buret tip._ - _Using an uncalibrated buret._ - _Reading the burette scale repeatedly._4. **After a gravimetric determination of Ca, the following weighted masses of Ca were recorded: 0.123; 0.125; 0.121; 0.122; 0.116 and 0.123 g.** - _What was the standard deviation of these measurements?_ - _Identify the outlier using the Grub's test. Use Q = 0.05._ - _What is the new confidence interval? Use α = 0.05._5. **0.41 g of KHP (primary standard) was transferred to a 100 mL (±0.07) volumetric flask to obtain a 0.02 M KHP solution using both analytical and technical balances. The molar mass of KHP is 204.22 g/mol, and has negligible uncertainty relative to other uncertainties in this problem. C = m/MV.** - _What is the propagated error in the KHP concentration when the analytical balance (±0.0001) is used to weigh the solid?_ - _What is the propagated error in the KHP concentration when the technical balance

"Since you have asked multiple questions, we will solve the first question for you. If you want any…

1- Which statement is not a good practice during weighing in Chemicals should never be placed directly on the weighing pan. Close the glass door of the balance before reading. X Hot samples can be weighted on the balance at any temperature. Use tissue paper to place objects on the balance. u chould nerform?

1- Which statement is not a good practice during weighing in Chemicals should never be placed directly on the weighing pan. Close the glass door of the balance before reading. X Hot samples can be weighted on the balance at any temperature. Use tissue paper to place objects on the balance. u chould nerform?

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

Hi! Is this correct? Kc = [N2O] [NO2] / [NO]^3
I need help with questions 1-7?
3 نقاط .Titrant is usually in In a conical flask. In beaker. In buret.
Complete the table
1b. 1. KMnO4, H¹, warm 2. H₂O, H+ 3. CH₂N₂
A2
i need the answer quickly
_C,H,COOH + 0, - CO, + __ H,O _H₂O
A Moving to another question will save this response. Question 21 If n = 2, what value cannot mĮ have? explain your reason in a separate sheet. O ml =+1 %3D O ml = -2 O ml = -1 O ml = 0 A Moving to another question will save this response. 257 44.823 APR 23
Complete the following nuclear equations. Write the mass number, atomic number, and symbol for the remaining nuclide. (Enter your answer in the form X. Enter He for an alpha particle, 18 for a beta particle, y for a gamma particle, 8 for a positron, n for a neutron, and p for a proton.)
Describe in details the twelve-basic principle of Green Chemistry.