Which of the following is true?

a.) a buffer is most resistant to ph change when [acid] = [conjugate base]

b.) the most effective buffers are those of strong acid/strong base pairs.

c.) an effective buffer has a [base]/[acid] ratio in the range of 10 - 100

d.) a buffer can not be destroyed by adding too much strong base. it can only be destroyed by adding too much strong acid.

e.) an effective buffer has very small absolute concentrations of acid and conjugate base.

How much would the freezing point of water decrease if 4 mol of sugar were added to 1 kg of water(k=1.86 c/mol/kg for water and i=1 for sugar

Vi limitens. vastery test select the correct answer. which statement explains why large atoms are more reactive than small atoms? a. large atoms have valence electrons farther from the nucleus and lose them more readily. b. large atoms have greater ionization energy, which they can utilize during a reaction. c. large atoms have a greater number of electrons that they can lose during a reaction. d. large atoms have more energy levels, so they have more energy to pass on in a reaction. reset next

What is the formula of the ionic compound composed of calcium cations and chloride anions