Magnesium Definition and 82 Threads

Hey guys, I'm on a bit of a time crunch here, I have to have everything buy Wednesday (10/27). I've been asked to give a presentation on food in the classroom at a meeting on Wednesday. What I normally like to do is a demonstration involving a Flameless heater. I just use the same technique...

Hi If you were making MgO by heating Mg in a crucible with a lid on, why might the MgO escape when you lift the lid. Isn't MgO a solid? thanks

[FONT="Trebuchet MS"]I recently repaired a domestic water heater and had to replace the heater element that was heavily coated with hard water salts as well as the SS (Stainless Steel) tank had a large quantity of salt precipitate; the heater element has the option to have a magnesium rod/...

If I have x moles of magnesium and y moles of a monoprotic strong acid (I'm talking about something like 0.03 moles or less of each reactant with the magnesium being the limiting reactant) the there's going to be a noticable pH change right? Because I remember my teacher showing us the...

In my work we are suffering now from a problem of magnesium in water that we are using for drilling, we need test kit to test magnesium oncentration we could not use photometric analysis or any other complicated device we need method of testing depend on titration reaction could anyone help me

1. Homework Statement In a calorimeter, a 1.0g sample of magnesium is burned to form MgO. In doing so, 25.5 kJ of energy is released. The molar enthalpy of combustion of magnesium is: a) -0.0392 kJ/mol b) -25.5 kL/mol c) -306.2 kJ/mol d) -620 kJ/mol Homework Equations Q= mc...

Homework Statement i'm finding out the empirical formula of magnesium oxide for chem class. this is my data trial 1 trial 2 1. mass of crucible, lid, and metal (g)...

Homework Statement Would the Mg : O ratio be affected if some magnesium oxide smoke escaped during the reaction of Mg with oxygen gas? Please explain with a sample calculation. Thanks.Homework Equations I know that the empirical formula is MgO.The Attempt at a Solution I don't understand how...

Why is magnesium not used much for engine castings? the old air cooled VW engines were light enough (bare) to be easily lifted by one person surely there is a big power to weigh ratio to be gained. If i remember correctly added copper reduced corrosion to after market castings.

Homework Statement ok so I'm trying to find the change in enthalpy for this reaction: Mg(s) + (1/2)O2--> MgO(s) I've done the lab to find the temperatures of certain reactions, these were: 9.70 Celsius for the reaction Mg(s) + 2HCl(aq)--> MgCl2(aq) + H2(l) 7.60 Celsius for the reaction...

Homework Statement Finding the heat of combustion of magnesium.Homework Equations 1.) MgO(s) + 2HCl(aq) → MgCl2(aq) + H2O(l) ∆Hr = 1047.61KJ/mol *This value was found experimentally 2.) Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g) ∆Hr = 374.36KJ/mol*This value was found experimentally 3.)...

Homework Statement I already did the experiment but I'm trying to answer a question which asks" Suppose that you allowed some magnesium oxide smoke to escape during the experiment. How would the Mg:O ratio have been affected? Would the ratio have decreased, increased or stayed the same...

Homework Statement Calculate the average ratio of grams of hydrogen gas produced per gram of magnesium. This is part of a lab in which I know how many grams of magnesium were used and how many ml of hydrogen gas was produced Homework Equations Mg (s) + 2 HCl ---> MgCl2 + H2 The...

[SOLVED] What is the enthalpy of combustion of magnesium? Homework Statement Determine the enthalpy of combustion of Magnesium. Mg + 1/2O2 --> MgO magnesium + half oxygen -> magnesium oxide. The Attempt at a Solution I am not sure how to calculate this since I don't know where...

[SOLVED] magnesium and acid rates reactions im producing an investigation in the reaction between magnesium a solid metal, and acids of varying concentration, pH and temperatures. these variables are to produce results for comparison. however i am unsure about what apparatus would be most...

Homework Statement Find the ratio of the energies of the K characteristic x rays of carbon to those of Magnesium. Homework Equations The Attempt at a Solution I did it using Bohr's expression of energy...Is there any other method to do it?

MAGIC engine http://www.mitsubishi.com/mpac/e/monitor/back/0608/green.html The exciting thing about the MAGIC engine is that it introduces competition to the market, the first time since the demise of the steam and electric motor cars. Just watch oil prices drop like a brick striving...

How would one go about distingushing between magnesium alloys and aluminum alloys (physical characteristics)?

Hi.. Im trying to figure out what the affect of HCl on a magnesium strip at different concentration levels has? I can't figure out a 'scientific' response and therefore can't formulate a hypothesis :/ Any help will be appreciated.

Hello, I am fighting with a problem from grade 11 chem right now. The problem is why when sulphur bonds to other atoms, its ion charge often becomes 6+ or 2- while magnesium will always form an ion of charge 2+. I think I have an answer but am not sure. Is it because magnesium has a...

why magnesium nitrate does not react with sulphuric acid?:confused: can somebody help answering? thank you.:smile:

I'm currently trying to understand the concept that my chemistry teacher wants me to figure out. We are not doing stoichiometry. We haven't even gotten the definition for it. Now I need to find the empirical formula for magnesium Oxide. My friends kept telling me (MgO) Which I didnt fully...

Hey everyone, I have a homework question that I would appreciate some clarification on. Question: A 3.96g sample of magnesium carbonate decomposed to produce 1.89g of magnesium oxide. What mass of magnesium was in the sample of magnesium carbonate? Calculate the mass percent of of...

I am trying to calculate the fermi energy for magnesium assuming two free electrons...I need to figure out N/V, the number density of conduction electrons in magnesium, then I can just plug into u = (h^2/8m)*(3N/piV)^(3/2) ... right?? So if this is correct my question is how do I find N/V..I...

Hey I am just wondering can magnesium sulfate ionize?:confused:

Is there any way that i can extract magnessium from magnessium sulfate and sodium metal from salt Inside the house.

this is a question in my test.. and i failed to solve it wt's the flame color of magnesium chloride?

Why would hydrogen peroxide react better in the presence of magnesium dioxide than in the presence of sand? Also, in human systems, why is it good to have small particles rather than large chunks?

Short Question- What is the product resulted from burning magnesium? More Detail- For a chemistry lab I had to react magnesium oxygen- and thereby find out the empirical formula. Below is the lab procedure and my work. Procedure- 1) Heat a clean dry crucible to redness. (to prevent extraneous...

I placed some magnesium ribbon in HCl and measured the temperature change. How would i find the change in enthalpy per mole of magnesium in the following reaction: Mg + 2HCl --> H2 +MgCl2 If i know the following information: change in temperature = 19C...

Hi I was wondering what would be the equation for the rusting of magnesium? I did an experiment where an iron nail was covered by a strip of magnesium and was put into diluted NaOCl (diluted sodium hypochlorite solution). Apparently the magnesium protects the iron from rusting and hence rusts...

Hi! In terms of magnesium fluoride what is the minimum thickness of mag fl coating that must be applied to a glass lens to make it non-reflecting for that wavelength? (the index of refraction of magnesium fluoride is intermediate to that of air and glass) 1/2 wavelength out of phase to...