discussion Lab report for 1.) Phosphate buffer + HCI with PH meter of 6.0pH pH Paper...
discussion Lab report for 1.) Phosphate buffer + HCI with PH meter of 6.0pH pH Paper is 7pH. 2.) Acetate buffer + HCI pH meter is 5.6 and pH paper is 4ph
Homework Answers
Add Answer to:
discussion Lab report for 1.) Phosphate buffer + HCI with PH
meter of 6.0pH pH Paper...
and conclusions Part / pH measurements Substance pH (from paper) pH (from meter) acid or base?...
and conclusions Part / pH measurements Substance pH (from paper) pH (from meter) acid or base? Vinegar Ammonia Fruit Juice Lye Carbonated water Fertilizer Baking soda Shampoo Color of phenolphthalein in HCI Color of phenolphthalein in NaOH Therefore : What color is phenolphthalein in any acidic solution? What color is phenolphthalein in any basic solution? What color is red litmus paper in acid? What color is red litmus paper in base? What color is blue litmus paper in acid? What...
Measure and record the pH of each of the following: 1. 0.015M HCI - pH =...
Measure and record the pH of
each of the following: 1. 0.015M HCI - pH = 2.03
gent and then immerse them in the buffer solution. 4. Adjust the pH meter so that it reads the designated pH of the buffer. 5. Repeat the washing and drying procedure for the electrodes between the various parts of the experiment. Part 1: pH of various electrolyte solutions Measure and record the pH of each of the following solutions, use a clean dry...
This is from a Study of Buffer Solutions and pH of Salt Solutions Lab. I calculated...
This is from a Study of Buffer Solutions and pH of Salt
Solutions Lab. I calculated Ka to be 3.2*10^-5. Why is my value
larger than the standard value?
Procedure:
10. How does your calculated value of Ka compare with the standard value of Ka for acetic acid? Discuss why your value may be larger or smaller than the standard value. Caleutats Ka 3.2x 10-5) Cyato-s Learning Objectives: 1. To test the acidic and basic properties of ionic compounds 2....
1) How would you make 300 ml of a 0.1 M sodium phosphate buffer, pH 7.0...
1) How would you make 300 ml of a 0.1 M sodium phosphate buffer, pH 7.0 (pKa = 7.2) phosphate dibasic (the conjugate base). 2) What are the concentrations of acetate and acetic acid in a 0.2 M acetate buffer pH 5.3? The pKa for acetic acid is 4.76. 3)You have 100 ml of 0.1 M acetate buffer pH 5.2 (pKa 4.76). You add 10 ml of 0.1 M NaOH. Calculate the resulting change in pH and the buffering capacity...
In the buffer lab, students were asked to prepare a phosphate buffer given a target pH....
In the buffer lab, students were asked to prepare a phosphate buffer given a target pH. Malic acid (H2C4H4O5, Mr = 134.088 g/mol) is a diprotic acid in which the pKa1 for dissociation of the first proton is 3.40 and the pKa2 for dissociation of the second proton is 5.11. In a similar scenario, given 1.650 grams of NaHC4H4O5 (Mr = 156.070 g/mol), prepare 100.0 mL of a pH = 3.75 buffer. Determine the identity and mass of material needed...
which gives a better measure of the ph: universal ph paper or a ph meter? Post-Lab...
which gives a better measure of the ph: universal ph
paper or a ph meter?
Post-Lab Questions 1. Which pe o ple and proper 2. Gundulille battert data t opport your 3.Whach of your de cord was the desti n g changes 4. You are burde wp of u sodium barbana Na W s for show how t a H. und he whHO from the 5. Cele the expected pH v al the best carbon 6.12 n e d475 perimet...
You need to make 1 L of 100 mM acetate buffer at pH 5. But oh...
You need to make 1 L of 100 mM acetate buffer at pH 5. But oh no! The pH meter is broken, and you won’t be able to measure the pH of your solution. You look around on the shelves in lab and find a 100 mM solution of acetic acid (pKa = 4.76) and a 100 mM solution of sodium acetate. How do you make your buffer? Show your work / reasoning.
Pre-Lab Assignment Hydrogen Phosphate Buffer System This pre-lab assignment is mandatory. You will receive a zero f...
Pre-Lab Assignment Hydrogen Phosphate Buffer System This pre-lab assignment is mandatory. You will receive a zero for the experiment if the pre-lab assignment is not completed before the beginning of the lab session. 1. Calculate the masses of the conjugate acid and base needed to prepare each of the six buffer solutions listed in the table on the left. (p of H,PO,= 6.70) Assume the availability of the phosphate salts listed in the table on the right. Fill out the...
In our experiment, we will be using a portion of the phosphate buffer system that is...
In our experiment, we will be using a portion of the phosphate buffer system that is based upon the following equilibrium: H2PO4- HPO42- + H+ pKa = 7.2 In this case, H2PO4- will act as the acid and HPO42- will act as the base. Materials: 1M NaOH: 40.01 g/L of solution 1M HCl: 83 mL conc. HCl/L of solution Potassium phosphate, dibasic, K2HPO4, MW= 174.18 Potassium phosphate, monobasic, KH2PO4 MW= 136.09 **I already preformed this lab, but I struggled a...
Using the K values in the table below, calculate the pH of a buffer that contains...
Using the K values in the table below, calculate the pH of a buffer that contains the given concentrations of a weak acid and its conjugate base. 0.72 M Na HPO and 0.38 M Na PO pH Table 9.6 Common Buffers Buffer Weak Acid Conjugate Base к, Acetic acid/acetate CH-соон сн,соо" 1.8 x 10-5 Bicarbonate/carbonate HCO, co 5.6 x 10-11 Dihydrogen phosphate/ hydrogen phosphate H.PO HPO 6.2 x 10 Hydrogen phosphate/ phosphate HPO PO 2.2x 10-13
and conclusions Part / pH measurements Substance pH (from paper) pH (from meter) acid or base? Vinegar Ammonia Fruit Juice Lye Carbonated water Fertilizer Baking soda Shampoo Color of phenolphthalein in HCI Color of phenolphthalein in NaOH Therefore : What color is phenolphthalein in any acidic solution? What color is phenolphthalein in any basic solution? What color is red litmus paper in acid? What color is red litmus paper in base? What color is blue litmus paper in acid? What...
Measure and record the pH of
each of the following: 1. 0.015M HCI - pH = 2.03
gent and then immerse them in the buffer solution. 4. Adjust the pH meter so that it reads the designated pH of the buffer. 5. Repeat the washing and drying procedure for the electrodes between the various parts of the experiment. Part 1: pH of various electrolyte solutions Measure and record the pH of each of the following solutions, use a clean dry...
This is from a Study of Buffer Solutions and pH of Salt
Solutions Lab. I calculated Ka to be 3.2*10^-5. Why is my value
larger than the standard value?
Procedure:
10. How does your calculated value of Ka compare with the standard value of Ka for acetic acid? Discuss why your value may be larger or smaller than the standard value. Caleutats Ka 3.2x 10-5) Cyato-s Learning Objectives: 1. To test the acidic and basic properties of ionic compounds 2....
which gives a better measure of the ph: universal ph
paper or a ph meter?
Post-Lab Questions 1. Which pe o ple and proper 2. Gundulille battert data t opport your 3.Whach of your de cord was the desti n g changes 4. You are burde wp of u sodium barbana Na W s for show how t a H. und he whHO from the 5. Cele the expected pH v al the best carbon 6.12 n e d475 perimet...
Pre-Lab Assignment Hydrogen Phosphate Buffer System This pre-lab assignment is mandatory. You will receive a zero for the experiment if the pre-lab assignment is not completed before the beginning of the lab session. 1. Calculate the masses of the conjugate acid and base needed to prepare each of the six buffer solutions listed in the table on the left. (p of H,PO,= 6.70) Assume the availability of the phosphate salts listed in the table on the right. Fill out the...
Using the K values in the table below, calculate the pH of a buffer that contains the given concentrations of a weak acid and its conjugate base. 0.72 M Na HPO and 0.38 M Na PO pH Table 9.6 Common Buffers Buffer Weak Acid Conjugate Base к, Acetic acid/acetate CH-соон сн,соо" 1.8 x 10-5 Bicarbonate/carbonate HCO, co 5.6 x 10-11 Dihydrogen phosphate/ hydrogen phosphate H.PO HPO 6.2 x 10 Hydrogen phosphate/ phosphate HPO PO 2.2x 10-13
Most questions answered within 3 hours.
-
Our ability to see distinct edges as well as our errors in
contrast perceptions (e.g., seeing...
asked 16 seconds ago -
you want to measure the gravitational acceleration at your
location. since g does not vary significantly...
asked 14 minutes ago -
Aside from commercial tools that are specifically geared toward
TAR/PC( Technology-Assisted Review), are there potential
alternative...
asked 16 minutes ago -
A woman expends 94 kJ of energy in walking a kilometer. The
energy is supplied by...
asked 8 minutes ago -
the period of a pendulum on earth is 5 seconds. what will be the
period of...
asked 32 minutes ago -
The
act of turning media against itself, such as flash mobs and
billboard is called
a....
asked 27 minutes ago -
A set of length measurements are obtained with the values 165.6
± 0.3, 165.1± 0.4,166.4± 1.0,...
asked 29 minutes ago -
Vertical Analysis
Income statement information for Einsworth Corporation
follows:
Sales
$237,000
Cost of goods sold
78,210...
asked 35 minutes ago -
A simple random sample was taken to test the claim that the
population mean is no...
asked 30 minutes ago -
Overview
JAVA LANGUAGE PROBLEM:
The owner of a restaurant wants a program to manage online
orders...
asked 36 minutes ago -
1- What is “progressive production?”
2- Where did the assembly line originate? (Name the industry)
3....
asked 33 minutes ago -
NPV
Project L costs $60,000 it’s expected cash inflows are $13,000
per year for 10 years,...
asked 38 minutes ago