Inorganic Chemistry

Does a solution of boric acid and sodium bicarbonate yield CO2?

Hello everyone i have a curve of cyclic voltammograms (current Vs Votlage) that represents reduction and oxidation potentials of each component of my product (if i have understood correctly) I want to understand how to determine LUMO and HOMO levels from the curve and from those 2 relations: ELUMO=-e (Eonset,red +4.75) EHOMO=-e (Eonset,ox+4.75) Thanks in advance

Hey guys I’m currently having problems with this question on advanced inorganic chemistry. The topic is coordinate chemistry. Disregard the “exam 2” ( don’t worry I’m not cheating) it’s actually a practice exam from last semester.

I used 3 mL of 95% ethanol? 3mL x 0.789/ml x mol/46.068 g = 0.0513gm OR 95gm/100ml =x/3ml, x= 2.85 gm ethanol x mol/46.068 g= 0.06187 gm

What is known about mixed reactant fuel cells? Which advantages and disadvantages do they have? Is this technology suitable for Sodium-Sulfur battery? https://www.mitacs.ca/en/projects/swiss-roll-mixed-reactant-fuel-cell-chemistries https://www.google.ca/search?ei=aZ35WaSUIpi9jwTo0ZxQ&q=mixed+reactant+fuel+cell&oq=mixed+reactant&gs_l=psy-ab.1.0.0i22i30k1l2.8795.16732.0.18144.14.14.0.0.0.0.216.1786.0j13j1.14.0....0...1.1.64.psy-ab..0.14.1774...0j0i131i46k1j46i131k1j0i131k1j0i67k1j0i13k1j0i13i30k1j0i13i5i30k1.0.ek-5tpOde44 How enzymatic fuel cell works? http://pubs.rsc.org/en/content/articlehtml/2015/ra/c4ra13565b If fuel and oxidant are…

Hi guys, I need help with a question. I have a pool with a volume of 120,000L. Its pH is currently at 8.2 and I need to lower it to 7.5 using muriatic (hydrochloric) acid with a concentration of 9M. How many litres of hydrochloric acid do I need to add? I've been given a table that lists the different amounts of HCl needed for different volumes of water but I'd like to know the steps behind calculating it. (Table recommends ~2.3L for a 120,000L pool) Thank you in advance, Matt

What is the fastest way to separate hydrogen peroxide into hydrogen and oxygen?

H2FSbF6 has a acidity 1016 stronger than 100% concentrated H2SO4 , how does Polytetrafluoroethylene (PTFE) survive the acidity of this level chemically, it says on the wiki that it is used to contain this super-acid and secondly, what are the strength of the bonds in PTFE?

I am a first year undergraduate and in my inorganic module we have recently undertaken a practical to find out various oxidation states of Vanadium. To start we made a stock solution by dissolving 2g of ammonium metavanadate (V) with 1.0 mol.dm-3 20 cm3 of sodium hydroxide. This we then added 35.0 cm3 sulphuric acid (1.0 mol.dm-3 ) and made the volume up to 250cm3 with deionised water. It was after the addition of the sulphuric acid that we observed the yellow solution and a red/brown precipitate/solid that then settled to the bottom of the volumetric flask. The solution was meant to be yellow with none of this precipitate so our initial thoughts are that a salt has be…

The pH of a mixture of 15 mL of 0.1 M NaOH with 25 mL 0.1 M HBZ is: Ka=6.28x10-5 The correct answer is 4.38, but I keep coming up with 4.42. If someone could should me how to get to 4.38 that would be greatly appreciated. Thanks!

Can somebody predict if it's possible to create a rechargeable battery based on the following chemistry: At discharge: Al + SCl2 = AlCl3 + S At recharge: AlCl2 + S = Al + SCl2

It is the widely held belief that to put an already raging fire out the only thing that works is water. While CO2, Nitrogen and Halon gases will starve a fire, they don’t reduce the heat. Even in enclosed environments where a fire has consumed all of the available oxygen and fades out leaving combustable gasses, once a firefighter opens the door a sudden rush of oxygen simply reignites the smouldering embers again, possibly with greater ferocity, as the materials on all surfaces in a room give off their own combustable gasses (pyrolisation) when reaching a certain temperature. If an externally applied container could be used to mimic the enclosed environment, wi…

Why can't (Fe3O4) and (Fe2O3) react with dilute acids ????

Hello, I'm trying to design a small analysis of a synthetic bone mass substitute. Its according to product descriptions made of 40% hydroxyapatite and 60% calcium sulphate of which the Calcium Sulphate is meant to slowly wash out in order for new bone to grow in. The synthetic bone also has some added iohexol for radio opacity. 1 mL of hardened mass will be placed in 5 mL isotonic NaCl. The idea is to analyse how much Calcium concentration rises over time in order to determine how fast the Ca Sulphate fase is washed out. Will hydroxyapatite or Calcium make bonds with Cloride? How much can I expect the Calcium concentration to change in 37 celcius? Will the pH ri…

I've met such statements that energy which a battery can deliver roughly depends on Fermi energy differences between anode and cathode materials. If we look in the table with Fermi energy values for pure metals, there exist large difference between Aluminum (12 eV) and Sodium (3 eV). http://hyperphysics.phy-astr.gsu.edu/hbase/Tables/fermi.html#c1 Both materials are inexpensive. Can we create an Aluminum-Sodium battery and if yes, how much energy will it offer?

Need to produce >95% pure Sodium Oxide, and want to know the easiest/cheapiest way to make it. Does Sodium Carbonate decomposes completely at >900ºC (or 1000ºC, 1100ºC) to Sodium Oxide? Or it´s a partial decomposition? I found in wiki the decomposition point is 851ºC. But at other wiki page says the Na2CO3 can boil at 1600ºC. What is truth? Or it´s better to heat Sodium Nitrite. I heated it, and NaNO2 doesn´t decompose at 800ºC. Also know, the Sodium Ascorbate decompose at ~300ºC to make Sodium Oxide, but it´s very expensive. There are other cheap compounds of sodium to make sodium oxide? (Note: I haven´t Sodium metal to react …

So I get that if you hook the "positive" side of the battery up to the part of the silicon doped with negative ions, that electrons will flow from the battery into that region. What I don't get is why the electrons are pulled into the neutral zone between the p and n type silicone, making the gap wider. What principle is pulling the electrons to the neutral zone?

I am investigating the stability of a colloid suspension and want to look at accelerating the sedimentation rates using centrifuges. I have set up an experiment with a control sample left on a bench to settle under gravity and have also calculated what the RPM to spin the centrifuge at to generate 9.81 N (gravitational force g). Assuming they are both exposed to the forces for the same length of time, they should both experience the same force and therefore, sediment at the same rate. If I wanted to look at longer duration times by spinning the centrifuge faster, is it correct in saying that exposing a sample to 2 x g is the same as leaving a sample for 2 days,…

Hi For my AH assignment, I was looking into the possibility of splitting brass into its core metals of copper and zinc and a method I found online was through electrolysis of brass in sodium bicarbonate which after reacting with ascorbic acid will leave me with copper(I) chloride as a precipitate and zinc chloride in solution. I just want to verify if this would be possible to do or if there was any other methods. I also want to know if it would be possible to do a titration against the zinc chloride solution (since from my understanding, it would be acidic) with a base to try and work out the concentration and then the mass of zinc.

The hobby of the noble; collecting every naturally occurring element. As a hobby it's an expensive one, but hey, atleast there's not a steady flow of new ones like there is with stamps, trading/gaming cards and such. I must admit that I have just started and don't really have any elements but my radium and tungsten sample are on their way. Any fellow collectors?

Factors Affecting the Stress of Film Different materials have various coefficients of thermal expansion. The smaller the coating materials’ and platings’ coefficients of thermal expansion are, the better the toughness of metal or alloy will be. Therefore, small stress of the coating film will lead to high quality. The stress of the film decreases with the increase of the vacuum degree. When the partial pressure of argon is less than 0.13Pa, the film usually does not produce stress. If the incident angle of the sputtered particles and the plating elements is less than 15 °, no stress cracks will be generated. However, if the angle is more than 15 °, the stress crack will …

Once, wayback, someone claimed in a counter-argument, that Uranium was a"Lithopfle element". This is the accepted view but is it right?This is based on the affinity to oxygen, so that the ligther oxides float on the core material of mainly iron. onsidering the well known processes of thermite welding, and panning for gold using metallic mercury, I can't help wondering if this ignores facts. It seems to me that these elements would have tended to exhaust available oxygen, at which point the process for forming aluminosilicates and their compsites with metallic oxides (rocks & minerals) would have ceased. The excess of iron, also a lithofile element, would otherwise no…

Is there a general formula for determining the amount of solution A, of concentration x%, required to mix with solution B, of concentration y%, to make a solution C that has a final concentration of z%.? A is the stronger stock solution and B needs raising. As an example, I have a 10% stock solution (Solution A) and I want to raise 150ml of 0.5% solution ( Solution B) to 2% (Solution C).

Hi there, I am running an EIS experiment but I am missing a few components to running my experiment successfully. The experiment entails 2 stainless steel electrodes placed 1 cm apart in a potassium ferrocyanide solution, do an EIS sweep, and collect the nyquist and bode plots. What i am not sure of: How long do I need run the experiment for to collect sufficient data? and; what concentration of potassium ferrocyanide should I be using? I was thinking 0.1 M/L. Any help would be appreciated!

It all started when I bet with my senior brother, that my warm tea will freeze before his, but instead his cold tea froze first....I felt bad so I tried it on my own with warm and cold water yet still the cold water freezes late. I was wondering why warm water freezes faster than cold water.....because with what I knw, cold water is likely to drop in temperature than hot or warm water. Please can any chemist open my eyes on this? Thanks.