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A) Methyl orange is an indicator that changes color over a range from pH =3.1 to pH =4.4 . What is Ka of methyl orange?
B) Phenolphthalein,Ka= 7.0*10^-10 , is colorless in its protonated form (HX) and fuchsia in its ionized form (X-). At what pH will phenolphthalein be a perfect pink color?
Calculate the pH at the equivalence point in titrating 0.100 M solutions of each of the following with 7.0X10^-2 M NaOH. (a) hydrobromic acid (HBr)
What is the molar mass of the enzyme if the osmotic pressure of the solution at 298K is 0.138 ATM? Note that enzymes are non-electrolytes.
What is their role in this reaction? In the case of this particular example that you watched, where would each of these ions have come from?
The melting point of a pure compound is known to be 110-111°. Describe the melting behavior expected if this compound is contaminated with 5% of an impurity.
Balance the equation and determine the mass in grams of chlorine that would be formed if 25 grams of PCl3 (molecular mass = 137.32 g/mol) decompose.
Suppose a buffer solution is made from formic and, HCHO2, and sodium formate, NaCHO2. What is the net ionic equation for the reaction that occurs when a small amount of sodium hydroxide is added to the buffer
A mixture of two miscible solvents that may be used as the solvent for a recrystallization experiment would be which of the following
when doing a synthesis of 2-chloro-2-methylbutane 1. Why must the reaction be carried out at room temp 2. Why is the crude product washed with sodium bicarbonate
nbspfind out the deltah0rxn fornbsp the given reaction as c3h4g 2 h2g rarr c3h8gnbspgiven nbspinformationnbspc3h4g 4
Explain both alkene and carbocation stability as it relates to hyperconjugation. - Explain how hybridization relates to alkene stability.
how do you calculate the molar enthalpy of barium nitrate in this situationbarium nitrate potassium sulfate -gt barium
A 2.000 ton block of aluminum at room temperature (22 degrees celsius) is struck by lightning. The lightning transfers 8.000 x 10^6 kJ of energy to the block
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