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Using concentrated acetic acid and solid sodium acetate, how would you prepare 10 l of 0.1 M acetate buffer at pH 4.75? The pKa for acetic acid is 4.75. What Volume of concentrated acetic acid is needed (mL)? What mass of sodium acetate is needed (g)?
What is the Brownian diffusivity of a 0.2 um (micrometer) particle in air? Assume T = 293 K and P = 1 atm.
Carryout the following conversions. Report your answer to the correct number of significant figures
The specific heat capacity of a certain monatomic solid is 0.392J*k^-1*g^-1. The chloride of this element (XCl2) is 52% chlorine by mass.
At 700 K the equilibrium constant for the reaction CCl4(g) C(s) + 2 Cl2(g) is Kp = 0.76. A flask is charged with 2.00 atm CCl4, which then reaches equilibrium at 700 K.
C7H6O3 + CH3OH --> C8H8O3 + H2O In an experiment 1.50 g of salicylic acid (C7H6O3) is reacted with 11.20 g of methanol (CH3OH).
A 0.0100 L sample of H2SO4 (Sulfuric Acid) was titrated with 0.150 M NaOH. It took 23.3 mL of NaOH from the buret -- that's 0.0233 L -- to reach the titration endpoint.
If an insufficient amount of liquid unknown had been used, how would this have affected the value of the experimental molar mass?
Two particles with charges q1 and q2 are separated by distance d. Rank these scenarios according to the magnitude of the electrostatic (coulombic) potential energy.
A 0.2527-g sample of a mixture of Mg(OH)2 and Al(OH)3 was treated with 50.00 mL of 0.225 mol L^-1 HCl(aq). The resulting solution required 13.73 mL of 0.176 mol L^-1 NaOH(aq) to neutralize the excess, unreacted HCl. What was the percentage by mass..
The standard reduction potential for Zn2+ is -0.76 volt and that of Cu2+ is 0.34 volt.a) Write the cell diagram for the Daniell cell (NH4NO3 salt bridge).
Compare the volume of 1.0 g of bromine, Br2, as a solid, liquid, and gas. The density of solid bromine just below the melting point of -7°C is 3.2 g/mL, of liquid bromine at 25°C is 3.1 g/mL.
A 0.894-g sample of gas occupies 125 mL at 60. cm of Hg and 25C. What is the molar mass of the gas.
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