E Home O * 63% () Mon 9:17 PM Q AutoSave ñ @ 5 0 - Ch. 15 and 16 Practice - Saved to my Mac Insert Draw Design Layout References Mailings Review View Share Calibri (Bo. 12 AA Aa A EVE AUDI BIUab XX ARYA ALI Styles Styles Pano Sensitivity Comments Paste 1) A solution is composed of 0.26...
At −11.5 ∘C−11.5 ∘C, a common temperature for household freezers, what is the maximum mass of fructose (C6H12O6) you can add to1.50 kg1.50 kg of pure water and still have the solution freeze? Assume that fructose is a molecular solid and does not ionize when it dissolves in water.
reaction. oxung H Zn(s) + 2H*(aq) — Zn2+ (aq) + H2(g) Reducing Agent - 2n 10. When 1.00 L of a water sample was treated with excess Ba2+ ions, 4.00 g of BaCO3 was formed. What mass of carbonate ions was present in the original 1.00-L sample? holar mass Bacon -197.39 /mol 4.00 g of BaCO3 = 4.00/197.34 mol 133...
(6 points) 95. A student is given three different acetic acid/acetate (HC2H302/C2H302) buffers: Buffer 1: HC2H302/C2H302* has a ratio of (1:1) Buffer 2: HC2H202/C2H302" has a ratio of ( 1:10) Buffer 3: HC2H302/C2H302 has a ratio of 1:100) Buffer 4: HC2H302/C2H302has a ratio of ( 1:1000) In two experiments, a student is asked to measure the pH of these Buffers...
Juichlorobutane bp 117-119°C CH=CH-CH2 -CH=CH2 + 2 Br2 - CH ---CH-CH2-CH-CH, Br Br Br Br 1.4-pentadiene 1.2.4.5-tetrabromopentane bp 26.0°C mp 85-86°C Usually the halogen is dissolved in some inert solvent such as tri- or tetrachloro- methane, and then this solution is added dropwise to the alkene. Reaction is nearly instantaneous, even at room temperature or below. No light or heat...
Calculate the Ka before adding the titrant (NaOH). Titration experiment between NaOH and H3PO4. Before adding the NaOH, the pH of the 10.00mL 0.15M H3PO4 and 20.0 mL DI water solution was 1.75. I'm stuck on how to calculate the Ka.
31. The organic base piperidine is found in small amounts in black pepper. What is the pH of 315 mL of a water solution containing 114 mg of piperidine? C5H1N + H,0 = C5HNH+ + OH- K, = 1.6 x 10-3
What is the pH of a buffer system prepared by dissolving 10.70 grams of NH4Cl and 35.00 mL of 12 M NH3 in enough water to make 1.000 L of solution? Kb = 1.80 × 10-5 for NH3. 9.26 9.58 8.93 11.69
Balance the equation, then determine what volume of a 12M HCl solution is required to produce 3L of H2 (8) at STP if you began with óg of Mg- Mg(s) + HCI-H2(g) + MgCl2 (aq)
I don't understand how to use equation three to figure out the composition of a penny's zinc % and copper % using the data I collected. Can someone show me how to do it? Trial 2 Data Table 4: The Penny Number of pennies Total mass of pennies (g) Initial volume of water (mL) Final volume of water (mL) Volume...