1. A 15.00 mL sample of 2.20 M malonic acid (pKa1 = 2.82; pKa2 = 5.70) is prepared in an Erlenmeyer flask. It is then ti

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1. A 15.00 mL sample of 2.20 M malonic acid (pKa1 = 2.82; pKa2 =5.70) is prepared in an Erlenmeyer flask. It is then titrated with1.50 M NaOH. Answer the following…
a) [1 pt] What volume of NaOH is needed to reach the firstequivalence point?
b) [1 pt] What is the solution pH after 33.00 mL of NaOH isadded to the solution?
c) [3 pts] What is the solution pH after 44.00 mL of NaOH isadded to the solution?
2. Ethylenediaminetetraacetic acid, or EDTA (H4C10H12N2O8), is atetraprotic acid with pKa’s of 2.0, 2.7, 6.2, and 10.3. Determinethe pH of this acid if it’s titrated to the third equivalence pointwith a strong base.
3. Consider an indicator that ionized as shown below forwhich its KIn = 1.0×10−4 . HIn + H2O H3O + + In - blue yellowConsider the following statements (assume no other coloredspecies): (1) The predominant color in its acidic form isyellow.
(2) An acidic to basic titration using this indicator willappear green before reaching the yellow endpoint.
(3) At pH = 7.00, a solution containing this indicator will beblue.
(4) At pH = 7.00, most of the indicator is in the ionizedform.
(5) During a titration using this indicator, only the colours ofblue and yellow will be observed.
Which combination of statements contain all the true statements?A) 1, 3, and 5
B) 2, and 4
C) 3, 4, and 5
D) 1, 2, 3, and 5
E) 2, 4, and 5
4.Which of the following salts will have the greatest solubilityin water, if they all have a Ksp = 10−25?
A) MX B)
MX2
C) M3X
D) M2X3
E) They all have the same solubility in water.
5. Consider a saturated solution of calcium fluoride, CaF2,an insoluble salt. If the solution is made more acidic how willthis affect the amount of CaF2 that can dissolve? Explain! Userelevant chemical equilibria as part of your answer.
6. Consider the following cell notation,
Pt(s) | I2(aq), I− (aq) || IO3 − (aq), H+ (aq), I2(aq) |Pt(s)
a) Write the balanced chemical equilibrium for thisreaction, in basic conditions.
b) The chemical equilibrium you wrote in (a) is bestdescribed as a…
A) Comproportionation
B) Disproportionation
C) Both
D) Neither