The reaction of the weak acid HCN with the strong base KOH is HCN(aq)+KOH(aq)⟶HOH(l)+KCN(aq). To compute the pH of the resulting solution if 47 mL of 0.46 M HCN is mixed with 31 mL of 0.40 KOH, we need to start with the stoichiometry.
How many moles of the excess reactant after reaction? number of moles:
What is the concentration of the excess reactant after reaction? concentration:
What is the concentration of the pH active product after reaction? concentration:1 AnswerChemistry2 months ago
A galvanic (voltaic) cell consists of an electrode composed of iron in a 1.0 iron(II) ion solution and another electrode composed of silver in a 1.0 M silver ion solution, connected by a salt bridge. Calculate the standard potential for this cell at 25 °C. Refer to the list of standard reduction potentials.1 AnswerChemistry4 months ago
What is the standard potential of a galvanic (voltaic) cell where X is the anode and Y is the cathode?Chemistry4 months ago
Cu(s)+Ag+(aq)⟶Cu+(aq)+Ag(s)1 AnswerChemistry4 months ago
a. If a chemical reaction is spontaneous, then the ΔS(sys) must always be positive.
b. If a chemical reaction with a negative ΔS(sys) is spontaneous, then ΔS(surr) must be positive.
c. If a chemical reaction is spontaneous, then the ΔE(univ)
must be increasing.
d. We do not need to worry about spontaneous reactions because they are rare.1 AnswerChemistry5 months ago