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Question: If 0.839 g of KHP were titrated, and 45.82 mL NaOH solution were necessary to reach the equivalence point, what is the concentration of the NaOH solution?
the color change at the endpoint should persist for 30 seconds. Why is this time lapse a good titration technique
Question- You are creating a buffer using a 0.150 M formic acid (HCOOH) and a 0.120 M sodium formate (HCOONa). Part 1) Write the equation for the reaction
a calorimeter contains 34.0 ml of water at 13.5 circc. when 1.80 g of rm x a substance with a molar mass of 70.0 gmol
It takes 49.0 J to raise the temperature of an 11.7 g piece of unknown metal from 13.0 C to 24.0 C. What is the specific heat for the metal?
calculate the percentage of empty space in 1 mol of water at 25C. Obtain the density from the experiment " Some Measurements of Mass and Volume." The volume of a molecule of water can be taken as the sum of the volumes of the two hydrogen atoms.
Problem- A certain atom has a threefold degenerate ground level, a non-degenerate electronically excited level at 3500 cm-1, and a threefold degenerate level at 4700 cm-1. Calculate the partition function of these electronic states at 900 K
what is the velocity of a hydrogen molecule after absorbing a photon @ 58.4 nm? what is the translational energy of the molecule in J mol-1
Explain what was the Conditional Formation Constant for the formation of the EDTA complex for Mg under these conditions?(KMgY2- = 4.9*109)
Calculate the mass of magnesium hydroxide formed in the reaction of 2.0 L of a 5.8 M solution of sodium hydroxide with excess magnesium nitrate.
calculate the kg mix- ture from the mixer, kg water evaporated, and kg jam produced.
A sample 60 mL solution of hydrochloric acid (HCl) is titrated with 0.2 M NaOH. The volume of base necessary to reach the equivalence point is measured to be 25.403 mL. Explain what was the original concentration of the acid
How many grams of C3H8O3 must be added to 720 grams of water at 70.0oC in order to lower the vapor pressure by 4.25 torr. The vapor pressure of water at 70.0oC is 233.65 torr.
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