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- 7.10
- 10.85
- 4 x 10–11
- 3.15
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- Based on the data in the table below, which of the following is the strongest base? Organic Acid Formic acid (HCOOH) K, pK, 1.8 X 10 4 3.74 Acetic acid (CH;COOH) 1.8 X 105 4.74 Propanoic acid (CH3CH2COOH) Ascorbic acid (vitamin C) 1.3 X 10 5 4.89 7.9 X 10 5 4.10 OCH;COONA O The conjugate base of ascorbic acid OHCOONa O CH;CH2COONA7b. Please helpWrite the balanced chemical equation for conversion of Al(s) to KAl(SO4)2·12H2O(s) in aqueous solution. Equation 1 - 2Al(s) + 2K+(aq) + 2OH-(aq) + 10H2O(l) --> 2K+(aq) + 2[Al(H2O)2(OH)4)-(aq) + 3H2(g) Equation 2 - 2K+ (aq) + 2[Al(H2O)2(OH)4]-(aq) + 2H+(aq) + SO42-(aq) --> 2K+(aq) + SO42-(aq) + 2Al(H2O)3(OH)3(s) Equation 3 - 2Al(H2O)3(OH)3(s) + 6H+(aq) + 3SO42-(aq) --> 2Al3+(aq) + 3SO42-(aq) + 12H2O(l) Equation 4 - K+(aq) + Al3+(aq) + 2SO42-(aq) --> KAl(SO4)2∙12H2O(s)
- A buffer is prepared using lactic acid (HLac) and sodium lactate (NaLac). 0.300 dm3 of the 0.500 mol·dm–3 HLac solution is mixed with 0.300 dm3 of the 0.300 mol·dm–3 NaLac solution to prepare the buffer. Ka for lactic acid (HLac) is 1.4 x 10–4. What will the pH of the above solution be after 5.0 cm3 of 0.200 mol·dm–3 NaOH has been added to only 100.0 cm3 of this buffer?True or false? A) Calcium acetate and sodium carbonate is Ca2+(aq) + 2C2H3O2-(aq) ----> Ca(C2H3O2)2(s) B) Magnesium chloride and sodium hydroxide is Mg2+(aq) + 2OH-(aq) ----> Mg(OH)2(s) C) Sodium phosphate and potassium nitrate, no reaction occurs. D) Ammonium sulfate and barium nitrate is Ba2+(aq) + SO42-(aq) ----> BaSO4(s)The concentration of STCO3 in saturated aqueous solution of salt at 25°C is 3.05 x 10-5 M. What is the Ksp of this sparingly soluble salt? STCO3(s) = Sr+(aq) + CO32 (aq) O 1.13 x 1013 O 5.52 x 10-3 3.12 x 10-2 O 2.34 x 10-17 O 9,30 x 10-10
- Good explanation Asap Thanks Hemoglobin, Hb, has four Fe atoms per α molecule that, on average, bind about three O2 molecules. Hb(aq)+3O 2 (g) = Hb(O 2 ) 3 (aq)Discuss mountain or space sickness (high altitude) in terms of this balance.The pyridinium ion (C5H4NH+) is a weak acid (Ka = 5.60 x 10–6). Calculate the pH of a solution that results from adding 1.00 mL of 0.158 M KOH to 27.7 mL of 0.174 M C5H4NH+ solution. The decomposition of a single compound at 378 K has a rate constant of 8.19 x 10-3 M-1 s-1. If the initial concentration of the reactant is 1.478 M, what is the concentration of the reactant after 87.22 seconds? (the answer should be entered with 3 significant figures; do not enter units; give answer in normal notation--examples include 1.23 and 12.3 and 120. and -123) If 3.47 grams of silver have been plated on a piece of metal from an AgNO3 solution after 6.95 minutes, what was the current (in amps) used to accomplish this? (the answer should be entered with 3 significant figures; do not enter units; give answer in normal notation--examples include 1.23 and 120. and -123 and 123. and 12.3)In an aqueous solution at 25 °C, if [HO] = 9.1 x 104 M, then [OH-] is: 8.0 F3 shot for a F5 F6 8 F7 DII F9 1 4 7 +/- F10 2 5 8 M 3 6 9 0 X C x 10
- Write the equilibrium expression for Kc for the reaction: 2 O3(g) => 3 O2(g)1. A buffer is prepared using lactic acid (HLac) and sodium lactate (NaLac). 0.300 dm3 of the 0.500 mol·dm–3 HLac solution is mixed with 0.300 dm3 of the 0.300 mol·dm–3 NaLac solution to prepare the buffer. Ka for lactic acid (HLac) is 1.4 x 10-4 What will the pH of the above solution be after 5.0 cm3 of 0.200 mol·dm–3 NaOH has been added to only 100.0 cm3 of this buffer? 2. Data in the table below were collected at 25°C for the following reaction:2 I–(aq) + S2O82–(aq) I2 (aq) + 2 SO42-(aq) a) Determine the rate law for the reaction. b) Calculate the rate constant, giving the correct units for k.2NaHCO3(s) = Na2CO3(s) + H20(g) + CO2(g) * 3 Right Left No Change co2 is removed Na2C03 is removed NaHCO3 is removed