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- I850 أسئلة امتحان الكيمياء العملي If you want to prepare a Sodium Hydroxide solution (40g/mole) (0.3M) in (250 mL) volumetric flask, * you will take. from (NaOH) 0.5g 3g 5g 3mg O10:49 2- 3C₂²- Complete the balanced molecular reaction for the following weak acid with a strong base. Be sure to include the proper phases for all species within the reaction. HF (aq) + LiOH(aq) → + Question 3 of 10 1 2 3 4 (s) OH- Reset LO F 5 H 6 7 8 9 6 Submit 个 x H₂O Tap here or pull up for additional resources 11 (aq) Li H₂O H3O+ OL Expressed in moles per liter, which compound has the largest solubility in water? (1) barium chromate, BaCrO4 (Ksp 1.2 × 10-10) (2) lead(II) carbonate, PbCO3 (Ksp 7.4 × 10-14) (4) copper(I) cyanide CuCN (Ksp 3.2 × 10-20 X O (3) aluminum phosphate, AlPO4 (Ksp 6.3 × 10-19) Moving to the next question prevents changes to this answer. MacBook Pro
- 7:37 PM Fri Feb 26 + AE ... I U which depends on the number of solute particles. So, if the same solute is added then elevation in boiling point depends on the concentration. Higher the concentration, the higher the boiling boint. 2. Which solution below would have the lowest freezing point below? a) 0.75 M NaCI (aq) b) 0.15 M NaCI (aq) c) 1.00 M NaCI (aq) Explanation: 3. Which solution below would you expect to have the highest boiling point? a) 0.5 mol of CaCl, in a 200 mL aqueous solution p) 0.5 mol of KCI in a 200 mL aqueous solution =) 0.5 mol of AlICI3 in a 200 mL aqueous solution Explanation:The molar solubility of the CdCO3 in saturated solution is given below. X = 2.3 x 10-6 What mass of CdCO3 dissolves in 250 mL to create a saturated solution? The molar mass of CdCO3 is 172.42 g/mol. CdCO3 = [?] x 10¹²] Coefficient (green) Exponent (yellow) g EnterTo calculate the concentration of H2SO4 gravimetric analysis is done by the reaction given below. When the 5 ml of H2SO4 were mixed with BaCl2 (assume excess amount) the precipitation of BaSO4 occurs and the following data were obtained. What is the concentration of H2SO4? (BaSO4: 233.38 g/mol , H2SO4: 98.079 g/mol) H2SO4(aq) + BaCl2(aq) → BaSO4(s) + 2HCI(aq) Mass of filter paper: 1.025 g Mass of filter paper + BaSO4: 1.200 g
- Solution X 100 mL of 0.10 M NaOH(aq) is mixed with 100 mL of 0.10 M HBr(aq) Solution Y 100 mL of 0.10 M NaBr(aq) is mixed with 100 mL of 0.10 M HBr(aq) Solution Z 100 mL of 0.10 M HC,H,O,(aq) is mixed with 100 mL of 0.10 M NaC,H3O,(aq) 6. A student prepares three solutions, X, Y, and Z, as described in the table above. The values of Ka for the acidic species in the solutions are given in the table below. Species Ka HBr(aq) >>I (very large) HC,H;O,(aq) 1.8 x 10-5 a. Using the information above, write the letters of the solutions in the boxes below to rank the solutions in order of increasing pH. Explain your reasoning for the ranking Lowest pH Highest pH b. Does the pH of solution Y increase, decrease, or remain the same when 100 mL of water is added? Justify your answer. c. The student adds 0.0010 mol of NaOH(s) to solution Y, and adds 0.0010 mol of NaOH(s) to solution Z. Assume that the volume of each solution does not change when the NaOH(s) is added. The pH of solution Y changes…1. Mg metal + 6M HCl No reaction Readily dissolved with H2 gases evolved Partially dissolved with the evolution of H2 gases 2. When potassium chlorate (KClO3) was heated, it produces a ________. luminol gypsum sugary gummy bear10. If 29.50 mL of 0.175 M nitrous acid neutralizes 50.0 ml. of harium hydroxide, what is the molarity of the base? 2HNO;(aq) + Ba(OH);(aq) Ba(NO:)(aq) + 2H;O(1)
