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Find the pH and volume (mL) of 0.0372 M NaOH needed to reach the equivalence point in titrations of (a) 42.2 ml of 0.0520 M CH3COOH
Based on the Henderson-Hassalbach equation how many mmols of Tris-HCl are there in a 100 mL of a 100 mM Tris-HCl buffer solution at pH 8.1? Note that the 100 mM refers to the sum of Tris and Tris-HCl concentrations.
CO(g)+Cl2----COCl2(g) Kc=255 at 1000 K If the reaction mixture contains a CO concentration of 0.1500 M and a Cl2 concentration of 0.175 M at 1000K. What are the concetnrations of each substance when equilibrium is reached
When 2.45g of an unknown weak acid (HA) with a molar mass of 85.0g/mol is dissolved in 250.0g of water, the freezing point of the resulting solution is -0.258 degrees C.
A pound of coffee beans yields 48 cups of coffee. How many milliliters of coffee can be obtained from 1 g of coffee beans?
Perform whatever separations and tests you think necessary to determine which ions are in fact present
Given the following two solutions: 0.200 M HC2H3O2(aq) with pKa = 4.76 0.200M NaOH(aq) A mixture is made using 50.0 mL of the HC2H3O2 and 25.0 mL of the NaOH. What is its pH?
a 1 l buffer solution with ph 9.05 is desired. one of the two ingredients of the buffer is hcn. what could the other compound be? Suggest a suitable ratio and determine the exact moles of the two compounds to achieve the desired pH.
A rectangular block of plastic, measuring 1.34 cm by 2.27 cm by 1.39 cm, floats in the middle of the Pacific Ocean. The volume of sea water displaced by the plastic block is 3.35 cm3. Assuming the density of the sea water is 1.025 g/mL, what is th..
680 mL of a solution of unknown concentration is diluted to a final volume of 1700 mL where the concentration is found to be 1.2 M. What was the initial molarity
How many grams of ethylene glycol C2H6O2 must be added to 1.15kg of water to produce a solution that freezes at -3.68 degrees celsius?
Calculate the wavelength of the light emitted when an electron in a hydrogen atom makes each of the following transitions as well as state the region of the electromagnetic spectrum (infrared, visible, ultraviolet, etc.)
A combustion devise was used to determine the empirical formula for a compound that only contains C, H, and O. A 0.6349 g sample of the unknown produced
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