In which set are both compounds soluble in water? magnesium chloride (MgCI_2), a
ID: 1068593 • Letter: I
Question
In which set are both compounds soluble in water? magnesium chloride (MgCI_2), and octane (C_2H_3) ethanol (CH-3CH_2OH) and propane (CH_3, CH_2, CH_3, carbon tetrachloride (CCl_4) and magnesium chloride (MgCI_2) magnesium chloride (MgCI_2) and ethanol (CH_3, CH_2, OH) When potassium chloride, KCI dissolves in water, which of these diagrams would best represent what you would expect to find in solution? Which is a precipitation reaction? 2Cr(s) + 6HNO_3(aq) rightarrow 2Cr(NO_3)(aq) + 3H_2(g) H_3 PO_d(aq) + 3KOH(aq) rightarrow K_3PO_4(aq) + 3H_2O(l) 3Ba(NO_3)_2(aq) + 2Na_3PO_3(aq) rightarrow Ba(PO_4)_2(g) + 6NaNO_3(aq) NaHCO_3(aq) + HC(aq) rightarrow NaCl(aq) + CO_2(g) + H_2O(g) What is the net ionic equation for the reaction of aqueous solutions of Pb(NO, )2 and KCI? 29. Which statement is correct for this reaction?, Pb^2 + (aq) + Cl(aq) rightarrow PbCl_2(g) Pb^2 + (aq) + 2Cl(aq) rightarrow PbCl_2(g) Pb(NO_3)(aq) + 2KCl(aq) rightarrow 2KNO_3(aq) + PbCl_2(g) 2K^+ (aq) + 2Cl^- (aq) + Pb^2+ (aq) + 2NO_3 rightarrow 2K^+ (aq) + 2NO_3(aq) + PbCl_2(g) Which is a conjugate acid-base pair in the reaction? N_2H_4(aq) + H_2O(l) doublearrow N_2H_2(aq) + OH(aq) N_2_H4 and H_2O N_2H_3^+ and OH^- N_2H_4 and N_2H_4^+, N_2H_4, and OH^- The pH of four different solutions was determined and then small amounts of strong acid (001 mol) were added consecutively to equal volumes of each. From these measurements, we can conclude that bef any acid was added solutions 1 and 3 are buffers but solution 3 has a greater buffer capacity than 1. greater buffer capacity than 1. solutions 2 and 4 are buffers but solution 2 has a greater buffer capacity than 4. solutions 3 and 4 are buffers but solution 4 has a greater buffer capacity than 3. none of the four initial solutions is a buffer. Equal volumes of solutions of acids and their sodium salts are mixed to prepare a buffer. The solution with p closest to 5.0 was prepared by mixing 1.0 times 10^-5 M hydrochloric acid and 0.1 M NaCl 0.10 M butyric acid (K = 6.3 times 10^-5 and 0.10 M sodium benzoate 0.10 M butyric acid (K = 1.5 times 10 and 0.10 M sodium butyrate 0.10 M formic acid (K 4.3 times 10 and 0.10 M sodium formateExplanation / Answer
25 - polar molecules solve in polar solvents, MgCl2 and ethanol soluble in water
26 - option A because KCl dissolves and give K+ and Cl- anion... K+ sarrounded by water and O of H2O will have ineraction to K+ and Cl- will have interaction with H of H2O
27 - option C is precipitation reaction because the product Ba3(PO4)2 (denoted as s - means solid)is precipitate out of the reaction mixture
28 - option A because in Ionic species such as K+ and NO3- are present bothe side of the reaction. These ions are called spectator ions. We can cancel them on both side of the compleate ionic reaction (in option D it has given). So remaining anions and cations are shown in the net ionic equation.
29 - option A is correct, CH3- is abstracting proton from NH3 so CH3- is a base
30 - option B
31 - option B; buffer solution means by adding small amount of acid or base the change in the pH is very low. In sol 2, the change is very less even after 2nd time addition so its have greater buffer sreength but in sol 4, after 2nd addition of base, its pH changed more, so having less buffer capacity