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The effect of a catalyst an on equilibrium is to _____ A) increase the...
Please help!!!!! A 80.0 mL aliquot of a 0.250 M Ca(NO_3)_2 solution was mixed with 60.0...
Please help!!!!!
A 80.0 mL aliquot of a 0.250 M Ca(NO_3)_2 solution was mixed with 60.0 mL of a 0.500 M NaF solution. K_sp(CaF_2) = 3.90 times 10^-11. Calculate the mass of CaF_2 that was formed. Determine the equilibrium concentrations of Ca^2+ and F^- ions remaining in the resultant solution.
Please answer and explain all! Thank you! You have a 250.-mL sample of 1.250 M acetic...
Please answer and explain all! Thank you!
You have a 250.-mL sample of 1.250 M acetic acid (K_a = 1.8 times 10^-5). Assuming no volume change, how much NaOH must be added to make the best buffer? A) 6.25 g B) 12.5 g C) 16.3 g D) 21.3 g E) none of these A solution contains 0.500 M HA (K_a = 1.0 times 10^-8) and 0.432 M NaA. What is the [H^+] after 0.10 mole of HCl is added to...
18) The primary buffer system that controls the pH of the blood is the buffer system....
18) The primary buffer system that controls the pH of the blood is the buffer system. a) carbon dioxide, carbonate b) carbonic acid, bicarbonate e) carbonate, bicarbonate @ carbonic acid, carbon dioxide e) carbonate, carbonic acid 19) A solution containing which of the following substances will be a buffer solution? a)-RbCl, HCH (6) CsF, HF c)- Nal, HI d) KBr, Br e) KNO, HNO, 20) Calculate the pH of a solution prepared by dissolving 1.50 mol of benzoic acid (HA)...
Please help with 1, 2, 3, 4 & 5 1. 2. 3. 4. 5. Classify the...
Please help with 1, 2, 3, 4 & 5
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Classify the following compounds as weak acids (W) or strong acids (S): hypochlorous acid perchloric acid chloric acid WSS OSSS Sww Owww OWs W A 25.0 mL sample of 0.723 M HClO 4 is titrated with a 0.273 M KOH solution. The H 30 concentration after the addition of 10.0 mL of KOH is М. O 0.440 O 1.00 x 10-7 0.723 O 2.81 x 10-13...
please show work 11)2SO2(g) + O2(8) 2503(8) For the reaction at equilibrium, ifO2 is removed, the...
please show work
11)2SO2(g) + O2(8) 2503(8) For the reaction at equilibrium, ifO2 is removed, the amount of SO2 present 2 is removed, the amount of SO2 present will 11) A) decrease B) increase C) stay the same 12) According to the Arrhenius concept, if HNOs were dissolved in water, it w A) a source of Hions. B) a source of hydroxide ions. C) an acid. D) a base. E) a proton acceptor. vater, it would act as12) 13) The...
24. Changing the volume or pressure in equilibrium: a) Affects gaseous equilibrium but has no effect...
24. Changing the volume or pressure in equilibrium: a) Affects gaseous equilibrium but has no effect on solid or liquid equilibrium b) Affects all equilibrium reactions c) Affects gaseous and solid equilibrium but not liquid equilibrium d) Does not affect equilibrium 25. When and acid reacts with a base what is the product formed? a) Metal oxides only b) A salt only c) Water only d) salt and water 26. Group III of ions is composed of the following ions:...
will you show me how to do #18? ) Of the following substances, an aqueous solution...
will you show me how to do #18?
) Of the following substances, an aqueous solution of NH4CI Cu(NO3)2 K2CO3 NaF will form basic solutions. A) NH4CI, Cu(NO3)2 D) NaF, K2CO3 B) K2CO3, NH4CI E) NH4CI only C) NaF only Answer: D 17) A 0.1 M aqueous solution of NaOCI KCI NH4CI Ca(OAc)2 will have a pH of 7.0 at 25.0°C. A) NaOCI D) Ca(OAc)2 B) KCI E) KCI and NH4C C) NH4C Answer: B 18) What is the pH...
Help please! Show work xercise 14.16 thodynamic 2. The equilibrium constant for the following reaction is called the...
Help please! Show work
xercise 14.16 thodynamic 2. The equilibrium constant for the following reaction is called the fluoride: constant for the following reaction is called the "solubility product of calcium CaF2(s) - Ca2+(aq) + 2F (aq) K = K = 3.2 x 10-11 a write an expression for the equilibrium constant of this reaction in terms of concentrations. why do you suppose we call this a solubility product instead of a solubility quotient or ratio (b) Calculate the equilibrium...
This is Thermodynamics in chemisty. Would you please teach both problems? For the reaction Fe O_(s)...
This is Thermodynamics in chemisty. Would you please teach both
problems?
For the reaction Fe O_(s) + H_2_(g) rightarrow Fe_(s) + H_2 O_(g) Delta H is 30.0 kJ/mole and Delta S is 24.0 J/mole-K. At what temperature will the reaction reach equilibrium? (A) 125 K (B) 298 K (C) 1250 K (D)2520 K (F) 760 K The Delta G degree for the ionization of HF is -20.5 kJ. Calculate the free energy change for ionization of hydrofluoric acid (K_a =...
Need help. Tnks which of the following boils at the highest temperature? A CH. B. C₂H6...
Need help. Tnks
which of the following boils at the highest temperature? A CH. B. C₂H6 с. Сан, D. CH10 24. Which probably has the lowest boiling point at 1.00 atm? A. HEB . HCI C. HBr D. HI E. C5H12 E. H2SO4 or the following substances has London dispersion force as its only intermolecular force? (NO hydrogen bonding, no dipole-dipole forces.) A. CH,OH S.NH, C.HS D. CHA 26. Which statement is true for the following structures: CH3CH2OH CH.CHOCHCHA NaF...
Please help!!!!!
A 80.0 mL aliquot of a 0.250 M Ca(NO_3)_2 solution was mixed with 60.0 mL of a 0.500 M NaF solution. K_sp(CaF_2) = 3.90 times 10^-11. Calculate the mass of CaF_2 that was formed. Determine the equilibrium concentrations of Ca^2+ and F^- ions remaining in the resultant solution.
Please answer and explain all! Thank you!
You have a 250.-mL sample of 1.250 M acetic acid (K_a = 1.8 times 10^-5). Assuming no volume change, how much NaOH must be added to make the best buffer? A) 6.25 g B) 12.5 g C) 16.3 g D) 21.3 g E) none of these A solution contains 0.500 M HA (K_a = 1.0 times 10^-8) and 0.432 M NaA. What is the [H^+] after 0.10 mole of HCl is added to...
18) The primary buffer system that controls the pH of the blood is the buffer system. a) carbon dioxide, carbonate b) carbonic acid, bicarbonate e) carbonate, bicarbonate @ carbonic acid, carbon dioxide e) carbonate, carbonic acid 19) A solution containing which of the following substances will be a buffer solution? a)-RbCl, HCH (6) CsF, HF c)- Nal, HI d) KBr, Br e) KNO, HNO, 20) Calculate the pH of a solution prepared by dissolving 1.50 mol of benzoic acid (HA)...
Please help with 1, 2, 3, 4 & 5
1.
2.
3.
4.
5.
Classify the following compounds as weak acids (W) or strong acids (S): hypochlorous acid perchloric acid chloric acid WSS OSSS Sww Owww OWs W A 25.0 mL sample of 0.723 M HClO 4 is titrated with a 0.273 M KOH solution. The H 30 concentration after the addition of 10.0 mL of KOH is М. O 0.440 O 1.00 x 10-7 0.723 O 2.81 x 10-13...
please show work
11)2SO2(g) + O2(8) 2503(8) For the reaction at equilibrium, ifO2 is removed, the amount of SO2 present 2 is removed, the amount of SO2 present will 11) A) decrease B) increase C) stay the same 12) According to the Arrhenius concept, if HNOs were dissolved in water, it w A) a source of Hions. B) a source of hydroxide ions. C) an acid. D) a base. E) a proton acceptor. vater, it would act as12) 13) The...
24. Changing the volume or pressure in equilibrium: a) Affects gaseous equilibrium but has no effect on solid or liquid equilibrium b) Affects all equilibrium reactions c) Affects gaseous and solid equilibrium but not liquid equilibrium d) Does not affect equilibrium 25. When and acid reacts with a base what is the product formed? a) Metal oxides only b) A salt only c) Water only d) salt and water 26. Group III of ions is composed of the following ions:...
will you show me how to do #18?
) Of the following substances, an aqueous solution of NH4CI Cu(NO3)2 K2CO3 NaF will form basic solutions. A) NH4CI, Cu(NO3)2 D) NaF, K2CO3 B) K2CO3, NH4CI E) NH4CI only C) NaF only Answer: D 17) A 0.1 M aqueous solution of NaOCI KCI NH4CI Ca(OAc)2 will have a pH of 7.0 at 25.0°C. A) NaOCI D) Ca(OAc)2 B) KCI E) KCI and NH4C C) NH4C Answer: B 18) What is the pH...
Help please! Show work
xercise 14.16 thodynamic 2. The equilibrium constant for the following reaction is called the fluoride: constant for the following reaction is called the "solubility product of calcium CaF2(s) - Ca2+(aq) + 2F (aq) K = K = 3.2 x 10-11 a write an expression for the equilibrium constant of this reaction in terms of concentrations. why do you suppose we call this a solubility product instead of a solubility quotient or ratio (b) Calculate the equilibrium...
This is Thermodynamics in chemisty. Would you please teach both
problems?
For the reaction Fe O_(s) + H_2_(g) rightarrow Fe_(s) + H_2 O_(g) Delta H is 30.0 kJ/mole and Delta S is 24.0 J/mole-K. At what temperature will the reaction reach equilibrium? (A) 125 K (B) 298 K (C) 1250 K (D)2520 K (F) 760 K The Delta G degree for the ionization of HF is -20.5 kJ. Calculate the free energy change for ionization of hydrofluoric acid (K_a =...
Need help. Tnks
which of the following boils at the highest temperature? A CH. B. C₂H6 с. Сан, D. CH10 24. Which probably has the lowest boiling point at 1.00 atm? A. HEB . HCI C. HBr D. HI E. C5H12 E. H2SO4 or the following substances has London dispersion force as its only intermolecular force? (NO hydrogen bonding, no dipole-dipole forces.) A. CH,OH S.NH, C.HS D. CHA 26. Which statement is true for the following structures: CH3CH2OH CH.CHOCHCHA NaF...
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