1st attempt See Periodic Table The (OH-] in an aqueous solution is 4.5x106 M. Find the...
1st attempt Feedback See Periodic Table See Hint In a 8.00 M nitrous acid (HNO.) solution, calculate (H'). Nitrous acid is a weak acid with K, 4.00 x 10" at 25°C M
1st attempt See Periodic Table See Hint A 1.00 L solution contains 2.00x104 M Cu(NO3)2 and 2.500x10 M ethylenediamine (en). The Ky for Cu(en)22 is 1.00x1020 What is the concentration of Cu2(aq) in the solution?
1st attempt See Periodic Table If the absorbance of a solution of copper(II)ion decreases by 17.00% upon dilution, what volume of water was added to 20.0 mL of a 1.20 M solution of Cu2+(ag)? mL of water added 04/18 >
1st attempt hi See Periodic Table See Hint Nicotine is responsible for the addictive properties of tobacco. Assume Kp1 1.0x10 1.10x103 M solution of nicotine. and K,2 1.3x10 11. De 1.0x106 and Kb2 1.3x10-11. Determine the pH ofa
11 Question (1 point) 1st attempt Feedback lud See Periodic Table See Hint AO.SOO M solution of potassium hydroxide is used to titrate citric acid (citric acid has three acidic hydrogens per molecule). How many mL of potassium hydroxide will be needed to neutralize 2.95 g of citric acid? (Citric acid has a molar mass of 192.1 g/mol.) ml SOF 13 QUESTIONS COMPLETED < 11/13 > • VIEW SOLUTION C TRY AGAIN o *
ho attempt penalty 08 Question (1 point) 1st attempt Feedback See Periodic Table See Hint While working in the laboratory, a technician accidently knocks over a beaker and spills all 200.0 mL of 2.5 MHCI. Which of the following would neutralize the spill and not have any base left over? (Assume each base will ionize 100%) Choose one or more A. 125.0 mL of 2.0 M Ca(OH)2 B. 100.0 mL of 5.0 M KOH C. 200.0 mL of 2.5 M...
07 Question (1 point) O See page 336 v 1st attempt hi See Periodic Table Q See Hint Calculate the mass of MgCos precipitated by mixing 10.00 mL of a 0200 M Na CO, solution with 5.00mL of a 00650 M Mgt NOa)2 solution.
Feedback See Periodic Table Fe(II) can be precipitated from a slightly basic aqueous solution by bubbling oxygen through the solution, which converts Fe(ll) to insoluble Fe(III): 4Fe(OH(aq) +40H (aq) +0,(8) + 2H,00) — 4Fe(OH), ) How many grams of O2 are consumed to precipitate all of the iron in 60.0 mL of 0.0850 MFeClu? 32 1st attempt
Question (1 point) 2nd attempt Feedback It See Periodic Table O See Hint In a 8.00 M nitrous acid (HNO,) solution, calculate (H). Nitrous acid is a weak acid with K - 4,00 x 104 at 25°C. 1.789 x 10- M > 1st attempt
05 Question (1 point) 3rd attempt And See Periodic Table O See H Balance the neutralization reaction of phosphoric acid with magnesium hydroxide. States of matter are not needed. 8 H2PO4+ Mg(OH)2 I > 2nd attempt 1st attempt BOF 13 QUESTIONS COMPLETED < 05/13 > VIEW SOLUTION SUBMIT ANSW o BI