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3. If 200. mL of 0.60 M MgCl2(ag) is added to 40U, ms t tilled water,...
4.82 (a) How many milliliters of 0.120 M HCI are needed to com- pletely neutralize 50.0 mL of 0.101 M Ba(OH)2 solution? (b) How many milliliters of 0.125 M H2SO4 are needed to neutralize 0.200 g of NaOH? (c) If 55.8 mL of a BaCl2 solution is needed to precipitate all the sulfate ion in a 752-mg sam- ple of Na2SOs, what is the molarity of the BaCl2 solution? (d) If 42.7 mL of 0.208 M HCl solution is needed...
1. I placed 5 mL of 0.025 M CuSO4 in a test tube, and slowly added 15 M NH3 until my solution turned blue, I then removed reactant by adding (CuSO4, NH3, H20, HCl, NaOH) and my test tube appeared clear, light light blue. That's because as I removed reactant, the Cu2+ concentration (increased, decreased, stayed the same) 2. In a medium test tube, I added 2 drops of 6 M NaOH to 5 mL of 0.05 M MgCl2(aq) to...
In a constant-pressure calorimeter, 60.0 mL of 0.300 M Ba(OH)2 was added to 60.0 mL of 0.600 M HCl. The reaction caused the temperature of the solution to rise from 24.37 °C to 28.46 °C. If the solution has the same density and specific heat as water, what is ΔH for this reaction (per mole of H2O produced)? Assume that the total volume is the sum of the individual volumes. Find kJ/mol of H20.
QUESTION 1 43.2 mL of aqueous 0.255 M Pb(NO3)2 is mixed with 36.1 mL of 0.415 M NaCl. The equation for the precipitate reaction is: Pb(NO3)2 (aq) + 2 NaCl (aq) --> PbCl2 (s) + 2 NaNO3 (aq) How many moles of PbCl2 are formed? (with correct sig figs) QUESTION 2 What volume (in mL!!!) of 1.28 M HCl is required to react with 3.33 g of zinc (65.41 g/mol) according to the following reaction? Zn(s) + 2 HCl (aq)...
References A 2.00 g sample of KCI is dissolved in 65.0 mL. of water. The resulting solution is then added to 15.0 mL. of a 0.430 M CaCl, (aq) solution. Assuming that the volumes are additive, calculate the concentrations of each ion present in the final solution. Concentration of K ions M Concentration of Ca ions Concentration of CI ions M Submit Answer Try Another Version 6 item attempts remaining
33. 20.0 mL of 0.200 M H,SO, is titrated with 0.100 M NaOH. What volume of 0.100 M NaOH is required to neutralize the acid? Na SO, (aq) + H,SO, (aq) + 2NaOH(aq) 2 H 0(1) A. 10.0 mL B. 20.0 mL C. 40.0 mL D. 80.0 mL How many nitrogen atoms are there in 4.0 moles of trinitrotoluene (TNT), C,H,(NO2),? A. 12 B. 2.0 C. 1.8 x 1014 D. 7.2 x 1024 E. 6.022 x 1023 31. A sample...
If the solubility of sodium chloride (NaCl) is 30.6 g/100 mL of H2O at a given temperature, how many grams of NaCl can be dissolved in 250.0 mL of H2O? If the solubility of glucose (C6H12O6) is 120.3 g/100 mL of H2O at a given temperature, how many grams of C6H12O6 can be dissolved in 75.0 mL of H2O? Only 0.203 mL of C6H6 will dissolve in 100.000 mL of H2O. Assuming that the volumes are additive, find the volume/volume...
53) A buffer solution contains carbonic acid (H CO) and sodium bi carbonate (NaHCO), each at a concentration of 0.100 M. The relevant equilibrium is shown below. What is H:COs(ag)+ HOo (a)+HCOs (ag) K.-4.5x 10 54) At 40 C, the pH of water is 6.77, what is lon-Prodact Constant for Water, Kw.at 40°C 55) If a solution of acetic acid has a pH-2.74 and a pK474, wh in the solution? Show your calculations is the ratio of (CH Co/ICOH) 56)...
By titration, it is found that 87.1 mL of 0.153 M NaOH(aq) is needed to neutralize 25.0 mL of HCl(aq). Calculate the concentration of the HCl solution. (HCI) In the acid reaction, classify each substance as the stronger acid, weaker acid, stronger base, or weaker base. A table of acids and their conjugate bases, listed by relative strength, may be helpful. HCN + HCO3 CN + H,CO Answer Bank weaker acid stronger base stronger acid weaker base Which direction does...
Please answer the questions clearly, showing all working. 1(i). Balance the following equations, and then write the net ionic equation (a) (NH4)2CO3(aq) + Cu(NO3)2(aq) → CuCO3(s) + NH4NO3(aq) (b) Mg(OH)2(s) + HCl(aq) → MgCl2(aq) + H2O(l) (c) BaCO3(s) + HBr(aq) → BaBr2(aq) + H2O(l) + CO2(g) 1(ii). For each reaction equation, identify the driving force of the reaction 2. What is an electrolyte? How can you experimentally differentiate between a weak electrolyte and a strong electrolyte? Name and give the...