Name 12. Which of the following salts will produce an acidic solution when added

Question

Name 12. Which of the following salts will produce an acidic solution when added to pure wa a. CszCOs b. NaF c, KCN d. All(NO33 e. Li2S Answer the following questions show all work for credit (65 pt) 13.) pt.) What is the reaction quotient (Q) for the equilibrium TisCN(s) TT (aa) SCN (ag) when 0.1837 L of 1.265 x 10 MTI s combined with 0.1335 L of 4.216 x 10 M scN in the presence ofan excess of TscN(s)? 14) (10 pt) Give the formula of the conjugate base for each of the following. (text prob) a. HPO4 b, H2S c, HNO2 d. H2Aso? e, HBrO

Explanation / Answer

Question 12.

acidic solution must contain H+ ions in solution

if [H+] > 10^-7, then this is considered acidic

then

a)

Cs2CO3 --> 2Cs+ + CO3-2

Note that CO3-2 will ionize as follows

CO3-2 + H2O <-> HCO3- +´OH-

OH presence means it is BASIC not acidic

b)

NaF will form:

Na+ and F- ions

F- + H2O <-> HF and OH-

once again, basic

c)

KCN --> K+ + CN-

CN- + H2O <-> HCN + OH-

this is basic

d)

Al(NO3)3 --> Al3+ + 3NO3-

note that

Al3+ + H2O <--< Al(OH)3 + 3H+

H+ presence implies acidic pH, i.e. pH < 7, [H+] > 10^-7

e)

Li2S <--> 2Li+ + S-2

S-2 + H2O <-> HS- + OH

this is basic

Related Questions

Navigate

• Browse (All)
• Browse N
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.