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Copper metal with silver ion
My book states that $\ce{2AgNO3(aq) +Cu ->Cu(NO3^-)2(aq) +2Ag(s)}$. In addition to the formula, it also shows the following image:As in the image it shows the salmon colored copper atoms are...
View ArticleDissociation of HCl in aqueous solution
My question is regarding $\ce{HCl}$. In my book it states that:$$\ce{HCl (aq) -> H+ (aq) + Cl- (aq)}$$I understand that when added to water the $\ce{H}$ leaves its electron to the $\ce{Cl}$ atom...
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Ionization of amino acids
In my book it talks about amino acids. It says the general structure of an amino acid is as follows: However, on the next page it lists specific amino acids such as glycine shown here:My question is...
View ArticleDifferentiating esters from glycosidic linkages
What exactly is the difference between an ester linkage and a glycosidic linkage? I know both release a molecule of water, but what is the difference? Is it simply which types of monomers are involved...
View ArticleWhat does the unit M stand for? [closed]
What does $\mathrm{M}$ signify in this pH calculation? To me, it just seems to be a random variable.For example: $\ce{[H+]} = 1.0\times10^{-7}~\mathrm{M}$I am not sure what the $\mathrm{M}$ is supposed...
View ArticleHow to find the volume of ice given its density, and the volume and density...
Just trying to understand density calculations, for example,Water has a density of $\pu{0.997 g cm^-3}$ at $\pu{25 ^\circ C}$; ice has a density of $\pu{0.917 g cm^-3}$ at $\pu{-10 ^\circ C}$.If a...
View ArticlePeroxide without hydrogen [closed]
How come we always see hydrogen peroxide and never peroxide by itself. Is there such a thing as peroxide ? Does this exist in nature? Why is hydrogen always associated with it? Please note: First...
View ArticleRounding of atomic weight isotopes
When we look at atomic mass, for example, $\ce{^134Ba}$ (barium) has a mass of $133.90 \,\mathrm{Da}$. Why is this rounded to $134 \,\mathrm{Da}$? This is shown in my book.
View ArticleWater hydrogen bond [duplicate]
In my book it states each water molecule can hydrogen bond to 4 other water molecules. However, it does not state why this is? Why is it 4 molecules and not 3? Is this related to the electron structure...
View ArticleMeaning of charges in a group?
In my class, my professor said that since hydrogen is in group one, it has a charge of 1+. Does this refer to its ionic charge or to its oxidation state?
View ArticleNomenclature of polyatomic ions
Is there a way to remember polyatomic ions (i.e $\ce{PO4^{3-}}$, $\ce{SO4^{2-}}$ etc.). For example, our professor will ask on an exam what the equation for iron (III) carbonate. Obviously the (III)...
View ArticleClarification on Oxidation Number and Ionic Charge
I am confused on the differentiation between ionic charge and oxidation number (state). For example and simplicity, $\ce{NaCl}$ is an ionic compound so it forms $\ce{Na+}$ and $\ce{Cl-}$. Are these...
View ArticleAmmonium in NH4Cl
I am learning the basics of bonding and reading about valence and lone electron pairs. I am confused on why nitrogen would bond 4 atoms of hydrogen such as in ammonium chloride. To me nitrogen has a...
View ArticleCalcium hydroxide and why there are parenthesis
Basics but in calcium hydroxide Ca(OH)2 ,*Where the 2 is a subscript what do the parenthesis symbolize? Why isnt it just CaOH2??
View ArticleRedox reactions
First semester chem student and I am wondering about redox reactions. For example, when copper is oxidized by silver ions in the reaction:Cu + 2Ag+(aq)----->Cu2+(aq) + 2Ag(s) what is causing the...
View ArticleAre there different types of symmetry? [duplicate]
What factor does the symmetry of a molecule play? For example, I know water is asymmetric so does this therefore make water polar (I know in fact that is is)? It may sound ignorant due to my lack of...
View ArticleIonic charge factors [closed]
New to chemistry so forgive the fundamental question. What exactly determines the element's charge? Oxygen has 2- and hydrogen has 1+. Oxygen wants to receive 2 electrons to complete a shell when...
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Phosphates Functional Group
In my text book it states that a phosphate group is considered to be $\ce{-OPO3^{2-}}$. However, online it states that phosphate is $\ce{PO4^{3-}}$. Why do these contradict? Am i confusing phosphate...
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Answer by Atticus283blink for Phosphates Functional Group
@ EDL, thank you. Im still confused on how the image above had a 2- charge. Im assuming the whole molecule is a formal charge of 0, correct? But if the 2 O atoms indicated in your drawing each have a...
View ArticleFormulas of synthetic polymers
I have a question regarding synthetics. $\ce{(C8H8)}_n$ is the formula for polystyrene. What exactly does the $n$ stand for? Thanks
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