What is the pH of 0.050 M Ba(CN)2 solution?

please show work. Thank you.

The separation of a mixture (NH₄Cl, NaCl and SiO₂) is accomplished by: (1) heating the mixture to sublime the NH₄Cl, (2) extracting the NaCl with water, and (3) evaporating water from both the NaCl and SiO₂, to yield the dry mixture.

Could the separation of these three components be accomplished in any other order while using same techniques?
Could the separation of these components be accomplished using other physical methods of separation besides these three?

Could please explain this to me? Thank you in advance!

Calculate the molar solubility, s, of calcium iodate in 0.020 M Ca(NO3)2, a completely dissociated strong electrolyte. (NO3- ion does not chemically interact with either Ca2+ or IO3-.) Assume that Ksp for Ca(IO3)2 = 2.0 x 10^-6.

To set up the problem, we write the following equations:

Material balance for calcium: [Ca2+] = s + 0.020

Material balance for iodate: [IO3-] = 2s

Ksp = 2.0 x 10^-6 = [Ca2+][IO3-]^2 = (s + 0.020)(2s)^2

The last equation only contains one unknown, the value of s, which we would like to calculate; but s is not negligible compared to 0.020, which leaves us with a nasty equation that is cubic in s. An approach that often works in a situation like this is to rearrange the equation into a more useful form and obtain s by iteration. Thus we can write

4s^2 = Ksp/(s + 0.020) or s = 1/2(Ksp/(s + 0.020))^1/2

We must find the value of s that makes both sides of the equation equal. Start first by inserting a trial value of s (say, 0.006M) in the right hand side of the latter equation and calculating a value of s. You will get s = 0.00438. For your next trial vvalue. take something about halfway between 0.00438 and 0.006. Continue the iteration process until you calculate a value of s that is nearly the same (within 5%) as the value you inserted on the right-hand side of the equation. Thank you!)

From the table of geometries below, determine the correct molecular shapes of GeF₄, SeF₄, and XeF₄. (Enter three letters that correspond to GeF₄, SeF₄, and XeF₄ in order, e.g. ABC, DCE, EBA, etc.)

the half life of protactinium-217 is 4.90x 10^-3 sec. a)what is the order of the reaction? How do you know? b) What is the rate constant for the decay?

The development and use of new drugs is one of the most important processes in modern healthcare. Complete the sentences below and place them in the correct chronological order.

a. when a promising drug molecule is identified it will be _______. Before being released onto the US market it must undergo extensive ___________ in clinical trials before finally receiving __________.

b. Many different related structures are made and tested to determine the _________ between molecule and its target effect. One way to produce many similar compounds quickly is called ___________.

c. New drugs are developed by starting with a ________, which shows promise for treating a target _______ or symptom. These compounds may be products from ________ which are known to be ___________.

d. Once the _________ has expired, chemically identical _______ can appear on the market.

e. After years of safe and successful use, some medicines become available as ____________ which are available without prescriptions.

A 37.5 g piece of gold at 83.0 �C is added to 100.0 g H2O at 22.0 �C in a well-insulated cup. What is the temperature after the system comes to equilibrium? (The specific heat capacity of Au is 0.129 J�g^�1�K^�1)

Calculate the [H3O+] of the following polyprotic acid solution: 0.145M H3C6H5O7.

Calculate the pH of this solution.

1. Solid urea, (NH₂)₂CO, burns to give CO₂,N₂, and liquid H₂O. Its heat of combustion is -632.2 kJ/mol. Balance the equation for combustion of urea, and calculate the heat generated per mole of H₂O formed. (Enter in kJ.)

1B.Using this heat of combustion and the appropriate thermodynamic data, determine the heat of formation of urea. (Enter in kJ.)

2. Given that the ΔH^o_rxn = -2842.0 kJ, for the following reaction:

2C₃H₅(NO₃)₃(l) → 6CO₂(g) + 1/2O₂(g) + 3N₂(g) + 5H₂O(g)

determine the standard enthalpy of formation, ΔH^o_f, for: C₃H₅(NO₃)₃(l)(nitroglycerin). Enter in kJ/mol.

3a. Use standard enthalpies of formation to determine ΔH^o_rxn for:

2SO₂(g) + O₂(g) → 2SO₃(g)

Enter in kJ.

3b. Use standard enthalpies of formation to determine ΔH^o_rxn for:

2NO₂(g) → N₂O₄(g)

Enter in kJ.

A team of USGS scientists detected a plume of the soil fumigant 1,2-dichloro-propane (DCP) in the groundwater flowing away from a field. The aquifer solids have an fOC (organic carbon content) of 0.6%, a solid density of 2.66, and a porosity of 0.3. If DCP partitions fast between OC and water, and if partitioning into OC is the main process that slows down DCP transport estimate the retardation factor Rf. log KOC [L/kg] = 2.28 for DCP.

Hello , I'm struggling in the following questions and I need an explanation if it is possible

question 1) :A 51.0 mL aliquot of HCl(aq) of unknown concentration was titrated with 0.226 M NaOH(aq). It took 102.4 mL of the base to reach the endpoint of the titration. what the concentration (M) of the acid was ?

question 2) :How many moles of BaCl2 are formed in the neutralization of 196.5 mL of 0.095 M Ba(OH)2 with aqueous Hal?

question 3) : Lead ions can be precipitated from aqueous solutions by the addition of aqueous iodide: Pb2+(aq) + 2I-(aq) → PbI2(s)

Lead iodide is virtually insoluble in water so that the reaction appears to go to completion. How many milliliters of 1.180 M HI(aq) must be added to a solution containing 0.200 mol of Pb(NO3)2(aq) to completely precipitate the lead?

question 4) :What are the respective concentrations (M) of Fe3+ and I- afforded by dissolving 0.300 mol FeI3 in water and diluting it to 750 mL?

question 5 ) :What is the concentration (M) of a NaCl solution prepared by dissolving 7.6 g of NaCl in sufficient water to give 490 mL of solution?

what is differences between the heat (q) of a reaction and the reaction enthaply (delta H_RXN)?

Which compound will have the larger R_f value on a SiO₂ TLC plate using 10% ethyl acetate/ hexane as eluent: 3-decanone or 3-decanol, toluene or benzoic acid, cyclooctane or cyclooctanone? Why?

10.5 mL of 0.100M ammonium chloride aqueous solution is titrated with 0.100 M NaOH(aq).

What type of solution is present when V_NaOH = 20.00 mL?

Select one:

a. strong acid

b. strong base

c. weak acid

d. weak base

e. buffered

A ruby has a mass of 12.10 carats (1 carat = 200.0 mg). Rubies are made of crystalline from of Al2O3. What percentage of the mass of the ruby is aluminum? How many atoms of alluminum are in this ruby? The density of rubies is 4.02g/cm^3. What is the volume of the ruby?