1 Answers
Call
involve a formal change in oxidation number........
And if we superscript the ..........
The metal has been (typically) oxidized, and has donated electrons to the non-metal, and thus reduced it..........
Can you write the individual half equations representing formal oxidation and reduction?
0
like
0 dislike
Talk Doctor Online in Bissoy App
Which of the given equations correctly represents the neutralization of magnesium hydroxide by hydrochloric acid?
$"a. "Mg(OH)_2(s)+2HCl(aq) rarr MgCl_2(aq) + 2H_2O(l)$
$"b. "Mg(OH)_2(s)+2HCl(aq) rarr MgO(s) + 2H_2(g) + Cl_2(g)$
$"c. "MgO(s)+2HCl(aq)$
We need a stoichiometric equation that represents the reaction between $Mg(OH)_2$ and $HCl$, and here it is............ $Mg(OH)_2(s) + 2HCl(aq) rarr MgCl_2(aq) + 2H_2O(l)$ Here, $1$ $"equiv"$ of magnesium hydroxide...
1 Answers 1 views
Which equation is correctly balanced:
$A.$ $Al(s) + 3O_2(g) rarr Al_2O_3(s);$
$B.$ $Al(s) + 3O_2(g) rarr Al_2O_3(s);$
$C.$ $Al(s) + 3/2O_2(g) rarr Al_2O_3(s);$
$D.$ $2Al(s) + 3O_2(g) rarr 2Al_2O_3(s)?$
Alumina is $Al_2O_3$, which is the product of aluminum oxidation. None of your equations shows the correct formulae. We can rewrite the correct equation as: $2Al(s)+ 3/2O_2(g) rarr Al_2O_3(s)$ This...
1 Answers 1 views
For the reaction $2Na(s) + Cl_2(g) -> 2NaCl(s)$, how many grams of $NaCl$ could be produced from 103.0 g of Na and 13.0 L of $Cl_2$ (at STP)?
You have to search the between Na and $Cl_2$ You have $ n= "mass"/"molecular mass" = (103,0 g)/(23,0 (g/(mol))) = 4,47 mol $ of Na. As 1 mole occupies 22,4...
1 Answers 1 views
In this reaction: $4HCl (g) + O_2 (g) -> 2H_2O (l) + 2Cl_2(g)$. When 63.1 g of $HCI$ react with 17.2 g of $O_2$, 49.3 g of $Cl_2$ are collected. How do you determine the limiting reactant, theoretical yield of $Cl_2$ and percent yield for the reaction?
We must first identify the limiting reactant, and then we calculate the theoretical yield and percent yields. We start with the balanced equation. $color(white)(mmmmmmmm)"4HCl" + "O"_2 → "2H"_2"O" +...
1 Answers 1 views
$H_2(g) + Cl_2(g) rarr 2HCl(g)$
The give reaction occurs at constant pressure...which is the only viable observation?
YOu have been given the chemical equation: $H_2(g) + Cl_2(g) rarr 2HCl(g)$ There are 2 equiv (moles if you like) of gaseous product, and 2 equiv gaseous reactant. Clearly, mass...
1 Answers 1 views
How many milliliters of a 2.5 M $MgCl_2$ solution contain 17.5 g $MgCl_2$?
Your strategy here will be to use the molar mass of magnesium chloride to determine how many moles you would have in that sample use...
1 Answers 1 views
For the reaction below, $K_p=81.9$. A reaction mixture contains $P_(I_2)=0.114$ atm, $P_(Cl_2)=0.102$ atm, and $P_(ICl)=0.355$ atm. Find the equilibrium values for $P_(I_2)$, $P_(Cl_2)$, and $P_(ICl)$?
Well, I would never recommend this "trial-and-error" method... I don't see why you should ever "have" to do it... just use the quadratic formula on the resulting quadratic equation. I...
1 Answers 1 views
Which equation is unbalanced?
$HCl(aq)+H_2O(l)rarr Cu^(2+) + 2NO_3^-$;
$Ca(OH)_2(s) stackrel(H_2O)rarr Ca^(2+) +2HO^-$;
$Ca(NO_3)_2(s) stackrel(H_2O)rarr Ca^(2+) +2NO_3^-$
;$NH_3(aq) +H_2O(l) rightleftharpoonsNH_4^+ + HO^-$;
$HCl(aq)+H_2O(l)rarr Cu^(2+) + 2NO_3^-$ $Ca(OH)_2(s) stackrel(H_2O)rarr Ca^(2+) +2HO^-$ $Ca(NO_3)_2(s) stackrel(H_2O)rarr Ca^(2+) +2NO_3^-$ $NH_3(aq) +H_2O(l) rightleftharpoonsNH_4^+ + HO^-$ And one of these things is not like the other ones.........
1 Answers 1 views
How does ammonia behave as a Bronsted base:
$"(i) "NH_3(g) + 7/2O_2(g) rarr 2NO_2(g) + 3H_2O$
$"(ii) "2NH_3(g) rarr NH_4^+ +NH_2^(-) $
$"(iii) "NH_3(g) + H_3CBr(g) rarr H_3CBr(g) + HBr(g)$
$"(iv) "NH_3(aq) +H_2O(l) rarr NH_4^+ + HO^-$?
Ammonia is a Bronsted base: $NH_3(aq) + H_2O(l) rightleftharpoons NH_4^+ + OH^-$ $pK_b = 4.75$ I am not going to solve this equation using $pK_b$, but most of the ammonia...
1 Answers 1 views
For which equation, does the enthalpy of reaction represent $DeltaH_f^@$ for methanol?
$1.$ $CO(g) + 2H_2(g) rarr CH_3OH(l)$ $2.$ $C(g) + 2H_2O(g) rarr CH_3OH(l)+1/2H_2(g)$ $3.$ $C(s) + 2H_2(g) +1/2O_2(g) rarr CH_3OH(l)$ $4.$ $C(g) + 2H_2(g) rarr CH_3OH$
The standard of formation is the enthalpy associated with the formation of 1 mole of substance from its constituent in their standard states under specified conditions. And of course...
1 Answers 1 views