Is the question perhaps worded a bit poorly?
Zinc and magnesium metal each react with hydrochloric acid according to the following equations: Zn(s) + 2HCl(aq) -> ZnCl2(aq) + H2(g) Mg(s) + 2HCl(aq) -> MgCl2(aq) + H2(g) A 10.00 g. mixture of zinc and magnesium is reacted with the stoichiometric amount of hydrochloric acid. The reaction mixture is then reacted with 156 mL of 3.00 M silver nitrate to produce the maximum possible amount of silver chloride. a) Determine the percent magnesium by mass in th original mixture. This normally wouldn't be so hard of a question for me, but I'm stuck because I cannot tell how to determine whether or not the AgNO3 is in excess because it does not have to have a stoichiometric amount to form the maximum possible AgCl(s), and if AgNO3 is in excess, I do not know how to solve for the amount that reacted with the product mixture of ZnCl2(aq) and MgCl2(aq). Can someone help me, please?! I'd greatly appreciate it! =)
When two or more substances are chemically combined, what is the resulting matter called? Is it a mixture?
Please read your CHEMISTRY BOOK. If there is a chemical reaction you get a different substance[s] depending on the equation[s] operative and the conditions. They can be elements, compounds, mixtures of both or simply a mess. Natural reactions seem to be very orderly resulting in all sorts of natural materials and living plants and animals. We study chemistry to try to understand these processes and perhaps make some use of them, so pay attention to what is happening around you.
How do I separate a mixture of two unknown NEUTRAL compounds? Extraction? Crystallization? Melting Point?
Depends on the nature of the compound and how it differs from the other one. If boiling points differ evaporation or distallation. If solubility changes drastically with temperature in a solution, or the two substances are have dramaticly different solubility in a solute perhaps crystallization. (at least 1.5 orders of magnitude) Column chromatography is also an option.
How might a solid mixture containing two major components be separated?
usually to purify a solid you can recrystalize the solid. One of the components might be more soluble in one solvent then the other and you can do this be dissolving the mixture in hot solvent and then let the solution cool down if you have the right solvent the less soluble component will crystalize (solidify) and the over will remain in the solvent then you can just filter and collect you compound.
Is this product an element, a compound, or a mixture? How do you know?
The product has changed colour and increased in mass - despite the fact that mass can not be created nor destroyed? Something has happened here me thinks. Is it perhaps possible the Magnesium has reacted with the Oxygen in the air to create Magnesium Oxide? Let's consider: Magnesium is in period 2 so it has two electrons to donate, Oxygen wants two electrons so I would guess if Magnesium had reacted with the Oxygen in the air we'd have MgO 2Mg + O2 = 2MgO let's see we have 2.5g of Mg and it has all turned ashy gray? Mg has an atomic mass of 24.305 g/mol O has an atomic mass of 15.999 g/mol MgO has a molecular mass of 40.304 g/mol so we have 2.500g/24.305 g/mol = 0.1029 moles of Mg. Our balanced equation tells us that 2 moles of Mg reacts with 1 mole of diatomic oxygen to give 2 moles of Magnesium oxide. Since 2 moles of Magnesium gives 2 moles of Magnesium Oxide, then one mole of magnesium gives 1 mole of magnesium oxide.That means if the gray ashy product is indeed MgO as we suspect we should have 0.1029 moles of MgO which will weigh 0.1029 * 40.304 = 4.147g (which is near enough to the 4.146g) that was measured to conclude that what we have is indeed MgO and the very tiny deviation can be written up to a truncation error in the calculations. Oh forgot to mention by concluding that what we have is MgO then we know it's a compound and not a mixture or an element.
Why isn't sugar a mixture?
I heard it's a compound but it's made from sucrose, lactose and fructose and those are compounds. Wouldn't sugar be considered a mixture? I'm making a project at school where I have to write the mixture and break it down from compounds to elements. Or just compound to elements and that's it. One of the things I have to do is sugar. How would I break that down?
What happens when we add sulphate to a salt solution? As mixture is made or created by mixing of two pure substance, what happens if we mix a pure substance like sulphate with a an impure substance like a salt solution?
“sulfate��� is not a pure substance, so you need to go back and read that chapter one more time, to understand what pure substances, compounds and mixtures are.Sulfate [(SO4)2-] is an anion which cannot exist without a counter-cation that will neutralize it. The cation might be two Na+, one Ca2+ or 2/3 Al3+ etc., so that the combined “salt”, i.e. Na2SO4, CaSO4 or Al2(SO4)3 is a neutral, pure substance.Salt solution is not an impure substance. It is a mixture, in which liquid water is mixed with a solid salt (I am assuming NaCl, but this could be ANY salt). The solution thus obtained is not traditionally considered a mixture, since it is homogeneous. For example, milk is an emulsion of fat and proteins in water, but we don’t normally think of milk as a mixture.Now, when you mix sodium sulfate (Na2SO4) with salt (NaCl) solution, the sodium sulfate will dissolve to the extent of getting the solution saturated, and then the remainder of the material will remain undissolved.In other words, you are not making “pure” sulfate “impure” by mixing it with salt solution. Instead, you are dissolving BOTH sodium sulfate and sodium chloride in water.Most interesting aspects of chemistry occur when you take a “pure” substance and get it a little “dirty” by mixing it with some other substance, either pure or impure. This is because chemistry is what happens when chemicals interact. So, get used to the “dirty” if you are interested in chemistry.
How can we separate a mixture of two invisible liquids?
I have never heard of an invisible liquid, and I doubt that one exists.Perhaps you meant a mixture of 2 immiscible liquids? (Like oil and water)In that case, you could separate them using a separating funnel. This funnel allows one liquid to settle below the other, and then the tap at the bottom of the funnel is opened to drain off the lower liquid.
What is the difference between mixtures and substances?
Here is the answer explained by using Venn diagram
Examples of elements, compounds and mixtures?
Elements are hard to come by in the home - you might find some pure copper or iron. Compounds are easy - practically everything is a compound. Table sugar, water (assuming the water is pure - tap water has dissolved particulates in it), Bleach (while, yes, it's generally fairly dilute (35% Available Cl- in it usually), if you think in terms of pure bleach, it's just a base dissolved in water. Sea salt is a good one too (pure NaCl) Mixtures you've got to think about as they have to contain different elements - yet these elements shouldn't be bonded. Table salt is actually NaCl:I - it contains NaI and NaCl molecules all mixed together - we know this as Iodized salt. Stainless Steel is a good one - Carbon and Iron and Chrome. If you've got a TV, the stuff that makes the screen glow, called Phosphors, are actually metal compounds that are mixed to create the proper wavelength of light when activated. Another good mixture is air - N2, O2, CO2, H2, Ar - there's pretty much a good mix of every gaseous element/compound in it.