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- Consider the following chemical equilibrium for the weak base CN in water: CN- (aq) + H₂O(1) = HCN (aq) + OH(aq). Which of the following statements is correct when more water is evaporated from system? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a b C d pH will go up; [OH-] will go up; net amount of OH will go up pH will go down; [OH-]will go up; net amount of OH will go down pH will go down; [OH-]will go down; net amount of OH will go down pH will go up; [OH-] will go up; net amount of OH will go downNaOH H20 4. 1. Mg°/Et20 2. CO2 5.In the following acid-base equilibria of weak acids in water, label the acid (A), the base (B), the conjugate acid (CA), and the conjugate base (CB). HCIO,(aq) + H,O(1) = H,O*(aq) + C1O, (aq) H₂CO3(aq) + H₂O(1) H₂O+ (aq) + HCO3(aq) H,O(1) +CH,NH (aq) = CH,NH,(aq) + H,O*(aq) O CH₂COOH(aq) + H₂O(1) ⇒ CH₂COO¯(aq) + H₂O+ (aq) O B Answer Bank CA A CB
- In the following acid-base equilibria of weak acids in water, label the acid (A), the base (B), the conjugate acid (CA), and the conjugate base (CB). HCIO, (aq) + H,O(1) = H,O*(aq) + CI0, (aq) H,CO, (aq) + H,O1) – H;O*(aq) + HCO; (aq) Answer Bank H,O(1) + CH;NH†(aq) = CH,NH,(aq) + H;O*(aq) СА А B СВ CH, COOH(aq) + H,O(1) - CH;COO (aq) + H;O*(aq)NaHCO3 (aq) + CH3 COOH (aq) —> CO2 (g) + H2O (l) + CH3 COONa (aq) Calculate the molar concentration of 100ml of vinegar (CH3COOH) and 2.5 ml of baking soda (NaHCO3). Note that the concentration of table vinegar is about 1 mol/L and the density of baking soda is 2.2 g/cm3Which one of the equations below represents what happens when HC2H3O2 is dissolved in water? O HC2H3O2+H20 C2H3O2 (aq) + OH (aq) O HC,H;0, + H,0 H;O*(aq) + C,H;02 (aq) O HC2H3O2+ H20 H30(aq) + C2H3O2*(aq) O HC2H;O2+ H20 2H*(aq) + OH (aq) + C2H3O2 (aq) O HC2H3O2+H20 H3O*(aq) + C2H3O2 (aq) eTextbook and Media Save for Later Attempts: 0 of 2 us P Type here to search SC 米 10 to 144 11 トト」 %23 %24 & 3 4 8. Q W R T Y A D G H. J K L V B N M LL
- NH4NO3(s) --> NH4+ (aq) + NO3- (aq) Determine DHsol (in kJ/mol NH4NO3) when 1.25 g of NH4NO3 is dissolved in enough water to make 25.0 mL of solution. The initial temperature of the solution is 20.7 oC and the final temperature after the solid dissolves is 16.8 oC. The density of the solution is 1.02 g/mL and the specific heat capacity is 4.18 J/g.oC.ENB Assume the densities of all solutions are 1.0 g/ml and their specific heat capacities 4.184 J/g. Experime The enthalpy change of neutralization Part I 3 NH4OH(aq) + HCl(aq)- NH4CI(aq) + H2O(E) 2.1 Equation of reaction: 2.0 M HCI 2.0 M NH.OH Volume Number of moles 0.05 25 ml 25 ml 0.05 Temperature 15 °C 15 °C eaction Initial Temperature,T Final Temperature, T Change in temperature, AT 15 °C 16.5 °C 1.5 °C Calculation of q- in J (q- = - qsa) 2.2 What is the enthalpy change (AH) in kJ.mol, when 1 mol of acid is 2.3 neutralized?Calculate the solubility at 25 °C of AgBr in pure water and in 0.39 M ammonia (NH,). You'll probably find some useful data in the ALEKS Data resource. Round your answer to 2 significant digits. Solubility in pure water: OM Solubility in 0.39 M ammonia: OM
- Complete the balanced neutralization equation for the reaction below. Be sure to include the proper phases for all species within the reaction. П + Reset 0₂ C 1 2 3 4 HC₂H₂O₂(aq) + Sr(OH)₂(aq) 2 3 2 3 ■ U 00 Question 52 of 70 ■ O LO 5 6 + ☐6 ²+ 3+ 2+ 7 8 9 07 ☐8 H 4+ U 0 (s) (1) (g) (aq) Sr 口。 • x H₂O Delete Submit +4 of 15 > Calculate the standard enthalpy of reaction, AHxn, of each of the given acid-base neutralization reactions involving the strong base KOH. The standard enthalpy of formation data are provided. $ = R Compound or Ion Standard Enthalpy of Formation (kJ/mol) -482.4 -285.8 -98.4 -349.5 -121.0 -372.1 -132.5 -80.3 -251.2 AHixn = F KOH(aq) H₂O(1) HCIO3(aq) KCIO₂ (aq) V HBr(aq) KBr(aq) NH(aq) HCIO3(aq) + KOH(aq) → KCIO3(aq) + H₂O(1) NH, (aq) K+ (aq) G Search or type URL % 5 T G B MacBook Pro 6 Y H & ve 7 N U J 00 8 M I ( 9 K O < H O L command A P Δ' 1 - ; 3 Question option [ + 11 + 21 = ? kJ/mol 11Suppose a 0.027 M aqueous solution of oxalic acid (H₂C₂O4) is prepared. Calculate the equilibrium molarity of C₂04. You'll find information on the properties of oxalic acid in the ALEKS Data resource. Round your answer to 2 significant digits. M 0 S ? OFF olo