Sodium Definition and 221 Threads

Q: Why is the 11th electron of the sodium atom located in the third energy level rather than in the second energy level? xD

Ok I searched and found this as the answer from a previous topic "The sodium potassium pump is required to maintain osmotic balance and stabilize the cells volume. If you treat an animal cell with ouabain, which inhibits the Na+/K+ pump, it will swell and often burst. Cells contain mostly...

Homework Statement Sodium ions (Na+) move at 0.844 m/s through a bloodstream in the arm of a person standing near a large magnet. The magnetic field has a strength of 0.259 T and makes an angle of 59.0° with the motion of the sodium ions. The arm contains 95.0 cm^3 of blood with a...

Here's the question: And the answer is: Which makes sense to me, because acetic acid is the stronger acid. But there's another option in the list that it says is NOT true: I thought this might be true, because both are solutions of chemicals that were referred to as acids. Am I...

does anyone know where i can get Sodium silicate or how to make it. it is nick named liquid glass and mechanics use it to repair head gasket leaks by pouring it in the radiator , and you can't get it at auto parts stores anymore. it is (Na2)(Si)(O3)

Homework Statement Part a) The emission spectrum for Sodium lamp contains a reasonably bright red line in its spectrum. What is its origin? Part b) The possible transitions between electron energy levels for Sodium were analysed. There were no transitions between the s series (s subshell)...

I was doing an undergrad experiment on the sodium emission spectrum and I have a few queries. Of course, I was asked to analyse the famous yellow doublet which I'm on top of. I was also asked the analyse the diffuse series which was fine too. What I did notice however, was a strong red line...

This is the question: Steps: I solved for the molar mass of 3 choices, but I don't know how to get the molar mass from the problem. I can get # of moles in the solution but what about gram? molar mass= gram/moles... tnx

Homework Statement I need to find the products of the reaction between sodium phosphate and ammonium molybdate. I know one of the products is a yellow precipitate Homework Equations Na3PO4(aq) + (NH4)2MoO4(aq) =?? The Attempt at a Solution I think it is just sodium molybdate and...

Homework Statement What fraction of the 3s-electrons of sodium is found within an energy k_b*T below the Fermi level? (Take room temperature at T= 300k) Fermi level for Na is 3.2 eV Homework Equations F(E) = 1 / {exp((E-E_f)/k_b*T) + 1} The Attempt at a Solution From what I can...

Homework Statement Living cells actively “pump” positive sodium ions (Na+) from inside the cell to outside the cell. It’s called pumping because it requires work to move the ions from the negatively charged inner surface of the cell membrane to the positively charged outer surface. It...

I have 0.2M solution of Sodium Acetate, (100ml with 1.6g NaAc) I want to work out the pH it should be. THERE IS NO ACETIC ACID ADDED. This is causing me nightmares! I am measuring ph 6.5 but apparently that is wrong. Why would that be so? Cheers!

Hi I'm looking at the structure of the Zeeman effect on the two yellow lines in the sodium spectrum. I'm using a Fabry-Perot etalong and a sodium lamp. The thing is, when I have just started the lamp, and don't have a magnetic field applied, i only see the two rings expected from the fine...

Okay, I'm stumped. I've been searching endlessly to find two pieces of information for an Honors Chemistry research paper. My mentor wants to me explain why we used sodium chloride rather than potassium chloride in our potato tuber osmosis experiment. I've searched six hours straight without...

Thank you in advance. Homework Statement Nitrogen gas can be obtained from the reaction between sodium azide and iron oxide. 6NaN_3_{(s)}+Fe_2O_3_{(s)} \rightarrow 3Na_2O_{(s)}+2Fe_{(s)}+9N_2_{(g)} a) What is the yield of this reaction, knowing that, from 390 g of azide and 400 g of...

Homework Statement Given a mixture of salt and sodium carbonate, how could you determine the amount of sodium carbonate in the mixture?Homework Equations The Attempt at a Solution Salt and sodium carbonate are both soluble, so I would I use HCl to react with the Na2CO3 leaving the NaCl H20 and...

Hi, I am final year student looking to implement a heating device similar to a hand warmer to one of my projects. The problem is that I need it to heat to a temperature over 55C, ideally it would generate a heat over 75C. Is there a similar process that incorporates a clicker and can be...

Homework Statement i understand that the wavelength given off by a sodium vapor lamp is 589nm, is this why there is a dark line in the continuous spectrum at 589mn? Homework Equations The Attempt at a Solution

Homework Statement 1x10^6 sodium atoms are excited to the 3p state at t=0s. The lifetime of the 3p state is 17ns. a.how many of these atoms remain in the 3p state at t=10ns? b.how many photons have been emitted from t=0s to t=30ns? Homework Equations N=Noe^(-t/\tau) The Attempt...

can sodium sulphate, p-toluidine, and benzoic acid form hydrogen bond with water?

I have been suck on a problem for days: We dissolve 3.778g of a sample that contains some sodium oxalate, Na_2C_2O_4, in water and acidify the solution with excess sulfuic acid. The sample requires 18.74 mL of 0.08395 M KMnO_4, potassium permanganate, for complete reaction according to the...

I am confused with how these reaction occurs. I don't know the polarity of compunds like NaHCO3, Amyl acetate, Benzoic Acid, Phenol, and EthylamineOrganic Sample with 1M HC with 1M NaOH with NaHCO3 Amyl acetate insoluble insoluble X Cyclohexane...

I need to determine the concentration of 100cm3 of aqueous sodium hydroxide solution (approximately to 2 mol dm-3) using 200cm3 of sulphuric acid by calorimetry (Enthalpy of neutralisation). I am using E=mct. As its an exothermic reaction i will be finding the temperature difference. From...

Homework Statement a) The strong yellow line (sometimes called the sodium D lines) is actually a doublet which can be resolved with the prism spectrometer, Can you explain the origin of the splitting? b) http://img266.imageshack.us/img266/4761/fig1cr4.png Why are there no transitions...

for my titration at school i need to create a sodium carbonate solution do i need to heat up the water or can i dissolve the sodium carbonate with simply stirring? help would be much appreciated

how would you prepare a 100ml of a 0.1M sodium phosphate buffer containing 0.5M NaCl,pH7.6 using henderson hasselbach equation??what chemicals would you use n how would you go about it

[SOLVED] Sodium monohydrogen phosphate In a question, I came across the compound sodium monohydrogen phosphate. It only gave the name and so I needed to work out the formula. The real forumla is Na2 H (PO4). I am wonderin about the bonding of this molecule. Phosphate has a -3 charge. H could...

Would sodium benzoate react (dissolve) when added to water and HCl, or to water and NaOH? Also, how would you write the chemical equations for the reactions?

Some one here is going to have to let me know if this is correct. Sodium Metabisulfite is chemically inter-changeable with Sodium Bisulfite. When Sodium meta-Bisulfite is hydrated, it is converted to Sodium Bisulfite. Na2S2O5 + H2O ========== 2 Na H SO3 From a solution these products...

What materials can be used for the piping in liquid sodium cooling loops (primary and secondary) and for the heat exchanger?

[SOLVED] Determine the mass of sodium chloride produced when 2.5 moles of chlorine ga Okay...I know how to solve half the problem. I know how to balance the problem but I'm not sure what to do next. I'm really bad at this stuff. Here's the question: Determine the mass of sodium chloride...

Homework Statement I'm having some trouble working out the math for the D-lines in the sodium spectrum. Now the measured wavelengths are 5889.96 angstroms and 5895.93 angstroms. It's easy enough to find the energy difference between these to be .00213 eV. Now I'm supposed to be able to...

i am a total newbie here...i understand basic principles like supercooling, phase change, etc, but otherwise a total dummy, i have equivalent to 1st yr university in chem, but that was a long, long time ago. so go easy on me. i am trying to find out the difference btwn sodium acetate...

Homework Statement A solution is to be buffer at pH = 3:35 with formic acid and formate. (a) How many moles of formic acid and sodium formate are needed if the solution is to change pH by < 0:02 for the addition of 0.02 moles of strong acid? i need help how to set up a problem like...

I want to separate sodium and potassium carbonate from the ashes of plants. My question is, Is sodium carbonate soluble in ethanol? I know that potassium carbonate is not so could i put the mixture into 200 proof ethanol and separate the two?

Is "Silver Chloride" soluble in "Sodium Hydroxide"?? Is "Silver Chloride" soluble in "Sodium Hydroxide"?? :confused:

Homework Statement Find the wavelength of the sodium transition 3p^{1},^{2}P -> 3s^{1},^{2}S Homework Equations E_{n,l} = -\frac{hcR}{(n - d(n,l))^{2}} d(3,s) = 1.374 d(3,p) = 0.884 \lambda = \frac{\hbar c}{\Delta E} The Attempt at a Solution Plugging the numbers in ain't...

Hello people...could u help me pls...coz i am rly stuck in these thing like calculations...i know all right answers but i am not too sure how to get them...please if somebody of us has a few minutes could u help me with that? Thank you very much. Azides are compounds of nitrogen , used...

Hi, I have a hand warmer a plastic packet filled with Na(C2H3O2)-3H2O and a small metal disk which is stressed and will produce a click if squeezed correctly. Once clicked the liquid will crystallize and the heat of fusion provides the hand warming. I've been asked by my children how it works...

Homework Statement Sodium ions (Na+) move at 0.851 m/s through a bloodstream in the arm of a person standing near a large magnet. The magnetic field has a strength of 0.254 T and makes an angle of 51 degrees with the motion of sodium ions. The arm contains 100 cm^3 of blood with 3 x 10^20 Na+...

Homework Statement Estimate the strength of magnetic field produced by the electron’s orbital motion which results in the 2 sodium lines(5890 & 5896 Angstrom). Homework Equations The Attempt at a Solution Let E be the potential energy of a magnetic dipole when placed in an...

Hi everyone i wanted to know why this is so, i know it has something to do with the quantum numbers but i want to know how and why? Your help will be greatly appreciated.

What is the charge on sodium in the following reaction, formation of 2Na^x +(CO3)^2-=Na2CO3 sodium carbonate? x=Unknown? Choices are: +3 +2 -2 +1 -1 HELPPP MEEE! Ariel

Hi all, i am hoping to make sodium bisulphite by passing so2 through NaOH. However, i was wondering if anyone has a link or a method to a titration for calaulating % sodium bisulphite, Regards,

Hi All! Am new to the forums, have been reading for a good while but thought I'd actually register and post something! I've been reading a lot about food safety lately and just cannot seem to get my head around how this chemical Sodium Nitrate is actually allowed in food products at all...

:confused: Hello I am a high school student and I am doing a Science Fair project on... something... anyways, I really need to know the Specific Heat Capacity of Sodium Acetate please, if anyone knows can you help me, or at least show me some websites, I have searched on Google and in textbooks...

I was wonder what exactly Sodium dodecylbenzene sulfonate is? How does the formula and shape of this look like? I especaillly don't understand wat dodecylbenzene and sulfonate is, is sulfonate another name for sulfate? Plz help me I'm sooo lost:confused:

Hey everyone, How does sodium carbonate soften hard water? Thanks, Lou

How many photons is sendt out per second from a 100 W natrium lamp, which gives a wawelenght of 589 nm(if 50% of the energi goes to the creation of light)? I think I have to use photo elektric effect, but how? Hints, anyone?

Problematic "Synthesis" of Sodium Acetate Greetings all, was hoping someone more knowledgeable than me (not a tall order, by any means) could point out some errors in my theory or method here. Fascinated by pictures of supersaturated NaCH3OOH solutions crystallizing at the drop of a dime (or a...