The glass electrode used in commercial pH meters gives an electrical response proportional to the concentration of hydrogen ion. Converting these responses to a pH reading requires calibration of the electrode against standard solutions of known H+ concentration. Preparation of the pH 7.00 standard buffer uses sodium dihydrogen phosphate (NaH₂PO4 H₂O, FW 138) and disodium mydrogen phosphate (Na₂HPO4, FW 142). Phosphoric acid (H₂PO4), a triprotic acid, has three pKa values: 2.14, 6.86, and 2.4. Calculate the weight in grams of sodium dihydrogen phosphate and disodium hydrogen phosphate needed to prepare 2.00 L of tandard buffer with a total phosphate concentration of 0.06 M. NaH₂PO4 = Na₂HPO4 = g

The glass electrode used in commercial pH meters gives an electrical response proportional to the concentration of hydrogen ion. Converting these responses to a pH reading requires calibration of the electrode against standard solutions of known H+ concentration. Preparation of the pH 7.00 standard buffer uses sodium dihydrogen phosphate (NaH₂PO4 H₂O, FW 138) and disodium mydrogen phosphate (Na₂HPO4, FW 142). Phosphoric acid (H₂PO4), a triprotic acid, has three pKa values: 2.14, 6.86, and 2.4. Calculate the weight in grams of sodium dihydrogen phosphate and disodium hydrogen phosphate needed to prepare 2.00 L of tandard buffer with a total phosphate concentration of 0.06 M. NaH₂PO4 = Na₂HPO4 = g

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

Related questions

Q: The guest list included 170 people who were invited, but 102 people showed up. What is the percent…

A: Given Data: Total Number of People = 170 Number of People Showed Up = 102

Q: CI OEt OEt TSOH, A CI- ZI

A: An arrow always depicts from a region of high electron density to low electron density ; that is…

Q: how do you solve ______C10H14N2(s)+ ______O2(g)---->____CO2(g)+____H2O(l)+_____NO2(g)?

A: Answer: The given equation which has to be balanced.

Q: I am a bit confused. Isnt the formula to find the change in temperature the Final Temperature minus…

A: q = heat energy q = heat energy is the total amount of energy. This is an amount and has no…

Q: (optional) Blue turquoise is an example of a hydrate mineral containing copper; the chemical formula…

A: Mass percentage of any component may be calculated as, Mass percentage = mass of the component total…

Q: Write the net ionic equation for the following reaction, including states of matter: RaCl2 (aq) +…

A: The Net - Ionic equation of the following reaction is given as -

Q: Hou THN Ho tu HN

A: strong acids are used for BOC deprotection – typically in organic solvents . Typical inorganic…

Q: 4) ½N½(g) + 02(g)= N02(g) ouboi N2(g) + 202(g) =N½04(g) Calculate Kc for each of the following. (a)…

Q: QUESTION 18 Which series of steps is required to perform the following conver Br 1. FeBr3, Br2 2.…

Q: The limiting reactant will always have the lesser volume of the reactants. True False

A: Limiting reactant is one among the reactants which has less stoichiometric value that is it has…

Q: What is a simple definition for saturated?

Q: The following reaction can be classified as 203(g) = 3 O 2(g) + heat %3D O heterogenous O exothermic…

A: Exothermic reactions, which releases energy in the form of heat or light. Endothermic reactions,…

Q: C4H10S(l) + O2(g)= complete and balance the combustion reaction.

A: Due to combustion reaction oxidation of the compound takes place.

Q: A hydrate [hydrates have the general formula AB • xH2O] is found to have the percent composition: Na…

A: In hydrate Na is 19.17%, C is 10.00%, H is 4.17% and O is 66.6%. In anhydrate Na is 27.38%, C is…

Q: These are the percent conpositions of the limiting reactant for three trials. Calculate the…

A: Generally coefficient of variation is consists of ratio of standard deviation per mean values in…

Q: Explain the diagram below in terms of kinetic and potential energy. Is the combustion of automobile…

A: The energy difference between the products and reactants is known as the energy change of a…

Q: • Table of Reagents: Chemical's Molecular weight (g/mol) Chemical structure Physical stat name…

Q: Nitric acid is a component of acid rain that forms when gaseous nitrogen dioxide pollutant reacts…

A: when aqueous nitric acid is fall with rain known as acid rain which is harmful to the environment.

Q: 3. Water has a heat of vaporization (AH) of 44.01 kl mol and boils at 100 "C at sea level. What is…

Q: 1. Calculate the theoretical percentage of water for the following hydrates. (a) manganese(II)…

A: “Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: A student sets up and solves the following equation to solve a problem in solution stoichiometry.…

A: From the given equation, we can see that the unit on the right side of the equation is mL. So, we…

Q: Flax fibers are extracted using the process. O coiling O retting O finishing O ginning O sizing

A: Flax is a flowering plant and is a type of food and fibre crop. It is used to make linen bedsheets,…

Q: Peroxyacetył nitrate (PAN) is one of the prime irritants in photochemical smog. It has the formula…

A: The total number of valence electrons in the molecule is (2x4)+(3×1)+(5×6)+5=46 electrons. The bonds…

Q: Alliin C6H11NO3S how many grams of sulfur in 0.358730606mol show work/ equations

A: There is one mole of S in 1 mole of C6H11NO3S Given that,moles of alliin = 0.358730606 mol ~…

Q: Conversion 95 mol H2O to kg H2O

A: Given, Moles of water = 95mol

Q: please help find the Percent yeild and limiting regent given the collected data Volume acetic…

A: Given: Volume acetic acid: 20.0 mL = 0.020 L Volume Isopentyl alcohol: 15.0 mL = 0.0150 L. Mass of…

Q: what is the meaning of dissociation?

Q: Given the unbalanced equation: Al + CuO Al2O3 + Cu. When properly balanced, the balancing…

A: According to the Law of conservation of mass " all atoms of different elements must be equal on both…

Concept explainers

Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.

Question

Nitesh

The glass electrode used in commercial pH meters gives an electrical response proportional to the concentration of hydrogen
ion. Converting these responses to a pH reading requires calibration of the electrode against standard solutions of known
H+ concentration.
Preparation of the pH 7.00 standard buffer uses sodium dihydrogen phosphate (NaH₂PO4 H₂O, FW 138) and disodium
hydrogen phosphate (Na₂HPO4, FW 142). Phosphoric acid (H₂PO4), a triprotic acid, has three pK₁ values: 2.14, 6.86, and
12.4.
Calculate the weight in grams of sodium dihydrogen phosphate and disodium hydrogen phosphate needed to prepare 2.00 L of
standard buffer with a total phosphate concentration of 0.06 M.
NaH₂PO₂ =
g
.
Na₂HPO =
6.0

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1: write the ionization of phosphoric acid

VIEW

Step 2: Calculate the concentrations of components in buffer

VIEW

Step 3: Calculate the weight

VIEW

Solution

VIEW

Step by step

Solved in 4 steps with 3 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.

Similar questions

QUESTION 7 Waking fast can consume 50keal per minute Hor many hours of eercbe are required to consume 450 kcal, the energy in a large candy bar? OA 125 O8175he OC75 OD15 OE1 QUESTION 8 Which of the lellwing does not have a unom composition troughout? OA Compound OB Heterogeneous mature OC Homogeneous midure OD Element OE Solvent Click Save ond Sumit to save and submit. Click Sene All Ansers to pae dil anrs
please answer quickly thank u
Relea
make sure that the limiting reagent is magnesium and please calculate the theortical yield
2. For, 4 CuzN (s) + 3 02 (g) → 6 Cu20 (s) + 2 N2 (g) (a) Find the mass of Cu,0 formed by using 6.0 grams of copper (1) nitride, Cu;N. Given amount Answer Work (by dimensional analysis) and units with units (b) Find the mass of Cu,0 formed by using 1.0 g of oxygen, 0,. Given amount Answer Work (by dimensional analysis) and units with units (c) Which reactant is the limiting reactant? (Cu3N or 02)
Ma X ATM HOMEWO X #5112480241329813180832311&eISBN=9781305862883&id=1707785907&snapshotid=33... D21 Grades - X G when doe X References Submit Answer MindTap x G Match ea X Use the References to access important values if needed for this question. Under certain conditions, the substance hydrobromic acid can be broken down to form hydrogen and bromine. ervation of Mass: Macroscopic: This is group attempt 1 of 10 Autosaved at 7:17 PM ☆ If 22.3 grams of hydrobromic acid react to form 0.3 grams of hydrogen, how many grams of bromine must simultaneously be formed? grams bromine Ch.2: Ato- Q Search Regenerat
A lab sample containing sodium chloride, ammonium chloride and sand. It initially weighs 3.207 grams, prior to heating. After heating that sample weighs 2.971 grams. What is the percentage of ammonium chloride in that initial mixture? Answer with the percentage, but do not include the percent sign.
51 to str piensquast leniladi di ei tedW In a process for obtaining pure copper from copper ore, 55.6 g of copper metal was obtained. Is this the theoretical it ton yield or actual yield?
For eac te, click the button under the better solvent. solute Which is the better solvent? :0: || :0: :0: CH,-S CH, НО -С — СH, — CH, — С — ОН CH;CH,OH CH; H C H
30 CI 'N ZI MeCN (Solvent) ?