Ronni M.

We are new to Wyzant and after responding to a tutor, some simply don't respond back. Is this typical of this tutoring resource? Very unprofessional and a waste of our time.

An aqueous solution at room temperature is 0.25 M in both Ba²⁺ and Ca²⁺ ions. Now try to separate these two ions by selective precipitation using SULPHATE. What percentage of the first ion will... more

I know that the answer is not B, but I just do not know the correct answer. Help!

An unknown solution was prepared by dissolving 0.420 g of sodium chloride or calcium chloride in enough water to make 0.100 mL of solution. 15.0 mL of 0.500 mol/L silver nitrate was required to... more

1. What is the pH initially?2. What is the pH 1.00mL before the equivalence point>3. What is the pH at the equivalence point?

From the following enthalpy of reaction data and data in Appendix C , calculate ΔH°f for CaC2(s) : CaC2(s)+2H2O(l)→Ca(OH)2(s)+C2H2(g)ΔH°=−127.2kJ

For which of the following reactions is ΔH°rxn equal to ΔH°f of the product(s)?You do not need to look up any values to answer this question.Check all that apply. A) Na(s)+12Cl2(g)→NaCl(s) B)... more