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A solution of sodium hydroxide is standardized against potassium hydrogen phthalate (abbreviated KHP for convenience). The balanced equation is NaOH + KHP → KNaP + H2O If a sample of pure KHP weighing 0.7749 g requires 34.69 mL of sodium hydroxide for titration, what is the molarity of the sodium hydroxide? The molar mass of KHP is 204.22 g/mol.
1. A buffer system contains 0.18 MNH4+ and 0.14 M NH3. pKa of NH4+ is 9.25. How many moles of NaOH must be added to 1.00 L of this solution to increase the pH to 9.25? 2. Titration of a 15.0 mL solution of KOH requires 17.0 mL of 0.0250 M H2SO4 ..
If it required 27.92 mL of NaOH to reach the equivalence point, what was the concentration of the acetic acid solution?
What is the percentage of Ag remaining in solution when 25.0 ml of 0.115 M AgNO3 are added to 37.0 ml of 0.108 M K2CrO4. The precipitate, if it forms, is Ag2CrO4, with a Ksp= 2.0x10^-12
The enthalpy of vaporization of water at 373 K and 1 bar is 40.7 kJ/mol and the molar heat capacities are 75.3 J/(mol K) for liquid and 33.6 J/(mol K) for gaseous water. Find the enthalpy of vaporization of water at 273 K and 1 bar.
Write the balanced chemical equation for this acid-base reaction, identifying theconjugate acid/base pairs. If the base-dissociation constant of B is 1 × 10−3, what is the pH at the midpointof the bu?er region. What are the chemical components of t..
How many milliliters of 0.459 M HBrO4 are needed to titrate each of the following solutions to the equivalence point. (a) 21.2 mL of 0.505 M KOH mL (b) 30.7 mL of 0.551 M NaOH mL
What mass (in grams) of potassium acetate, KC2H3O2, must be added to 132 mL of 0.010 M acetic acid to form a buffer solution with a pH of 5.06?
Substance A is a gray solid that consists of an alkaline earth element and carbon; the m% C in substance A is 37.5%. It reacts with substance B to form substances C and D. 4.0 x 1016 formula units of substance A weighs 4.26 micrograms.
Important information about Organic Chemistry, The most reasonable formula for a compound demonstrating M+ =101 with a minor M+1 peak is
The reduction reaction has the product 4-tert-butylcyclohexanol which is a mixture of cis and trans isomers. Methanol is the solvent, but I don't think that goes into the balanced equation.
Question- Calculate the wavelength associated with a ^20Ne atom moving at a velocity of 2.0 x 10^5 m/s. The atomic mass of Ne-20 is 20.18 amu. (1amu=1.66X10^(-24) g)
the density of liquid octane, H8H18, is 0.7025g/ml. if 1.00ml of liquid octane is vaporized at 100 degrees 100'c and 725 torr, what volume does the vapor occupy?
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