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amanda.castro's Achievements


Lepton (1/13)



  1. The one i bought is "Phillips Milk of Magnesia Genuine Original(see the following picture)" http://postimg.org/image/szhn0rkkv/ I want to make some basic chemistry experiments and part of it is to get pure magnesium hydroxide Mg(OH)2.
  2. Hello! I would like to know where can i get pure magnesium hydroxide Mg(OH)2. I read can i use milk of magnesia and boiling it, but i believe there are more components in that substance. It's true? If is not true, how can i get it? Thank you!
  3. Sorry bump this topic but i need an answer for my last reply above.
  4. First of all, thank you for your answer! I have more two questions related with this subject. 1- Well, if in my example oxygen XO- has 6 electrons available for bonding, why he cannot "borrow" 2 of them for Mg2+? Why is needed 2(OH)- to "satisfy" Mg2+? 2- The same thing happens with Na2+ and the others 2+ cations?
  5. Hey, guys! Considering the molecule XO- where X is an atom that makes single bond with oxygen. How many electrons he can "borrow" or "share" to the cations Na2+ or Mg2+? I'm asking this because i thought he could "borrow" or "share" all his outermost electrons, in other words, eight. So, if a cation 2+ needs two electrons, he(O-) could do what i said, but i see some molecules like Mg(OH)2 and Na(OH)2 and this makes me confuse! Thank you!
  6. Thank you very much for your answers, guys. A guy said to me that "the Mg2+ ion is not unstable, least not in solution. It is it's favored oxidation state which is why all natural forms of Mg involve it being in the +2 state". Ok, i think what he said is Mg2+ is not unstable because he has eight electrons in valence shell. yet he is charged(2+) so if there is in the solution anions i believe he will react with this anions. I just don't understand this part: "at least not in solution" and what means "favored oxidation state".
  7. Hello! Someone, please, tell me if it is possible cations react with nonpolar molecules. Is there any rule for it or depends on both, the cation and the molecule? I ask this because, from what i understand, for example, in reaction of Mg (OH)2 + H2O -> Mg2+ + 2OH-, Mg2+ is ionized so is unstable (actually i think he is stable because it has 8 electrons in the layer valence, but nevertheless is charged 2+). So, let's say i have this solution another polar substance, eg, XY, where X is more electronegative than Y. So, i thought would link to Mg2+ forming MgXY because X has a negative pole. Then I wondered: What if the substance is nonpolar? Thank you!
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