1 Answers
Call
Talk Doctor Online in Bissoy App
Nitrogen (N) and hydrogen (H) react wth each other to produce ammonia ($NH_3$). This reactor is shown in an equation as $N_2 + 3H_2 -> 2NH_3$. What is the ratio of nitrogen atoms to hydrogen atoms in ammonia?
The chemical formula for ammonia is $2NH_3$ meaning that we have two nitrogen atoms and six hydrogen atoms. To find the ratio of nitrogen atoms to hydrogen atoms...
1 Answers 1 views
A yield of $NH_3$ of approximately 98% can be obtained at 200 deg C and 1,000 atmospheres of pressure. How many grams of $N_2$ must react to form 1.7 grams of ammonia, $NH_3$?
We always have to read the problems completely to understand the question. In this case even when we have pressure and temperature conditions specified, they don't matter, first because they...
1 Answers 1 views
At a certain temperature, 4.0 mol $NH_3$ is introduced into a 2.0 L container, and the $NH_3$ partially dissociates to $2NH_3(g)\rightleftharpoonsN_2(g)+3H_2(g)$.
At equilibrium, 2.0 mol $NH_3$ remains. What is the value of $K_c$?
Remember to include the coefficients in the change in concentratio, as well as the exponents. I get $K_c = 1.69$. If $K_p = K_c(RT)^(Deltan_"gas")$, what would $K_p$ be if this...
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
Which for the following is considered a weak base?
A. Lithium hydroxide
B. Sodium hydroxide
C. Calcium hydroxide
D. Aluminum hydroxide
Thanks!
We gots $Al(OH)_3$...even tho this is still a basic species. $"Alumina"$, $Al_2O_3$, is an amphoteric oxide...that could act as an acid. The hydroxides of lithium, calcium, or sodium, all give...
1 Answers 1 views
Ammonia ($NH_3$) is a weak base with a $K_b = 1.8 x 10^-5$. What is the balanced chemical equation for the reaction of ammonia with water. Using the I.C.E the method, calculate the pH and ionization of a 1.75 M $NH_3$ solution in 2.50 M $NH_4Cl$?
Ammonia is a weak base and ionises in water: $sf(NH_3+H_2OrightleftharpoonsNH_4^++OH^-)$ For which: $sf(K_b=([NH_4^+][OH^-])/([NH_3])=1.8xx10^(-5)color(white)(x)"mol/l")$ These are equilibrium concentrations. The ICE table in mol/l is: $" "sf(NH_3"...
1 Answers 1 views
How would you determine the pH of 0.10 M $NH_3$ solution? $NH_3$ is a weak base with a $K_b$ equal to $1.8 x 10^-5$.
$NH_3(aq) + H_2O(l) rightleftharpoonsNH_4^+ + HO^-$ And so $K_b=1.8xx10^-5=([NH_4^+][HO^-])/([NH_3(aq)])$ We put in some numbers, and we assume that $x*mol*L^-1$ of ammonia ASSOCIATES, and thus at equilibrium, we know that $x=[NH_4^+]=[HO^-]$,...
1 Answers 1 views
When $HCl$ and $NH_3$ are mixed why is the buffer $NH_3-NH_4Cl$?
So how does this help us? You have an solution that is stoichiometric in ammonia; immediately you add hydrochloric acid, this protonates the ammonia, and now you both $NH_3$ and...
1 Answers 1 views
An $0.500*L$ volume of ammonia/ammonium buffer has $pH=9.15$. If $[NH_3]=0.10*mol*L^-1$, what MASS of ammonium chloride does this buffer contain?
Now for $"ammonium ion"$ in water $pK_a=9.24$ And thus, $9.15=9.24+log_10{[[NH_3]]/[[NH_4^+]]}$ Clearly, $log_10{[[NH_3]]/[[NH_4^+]]}=-0.09$ And so, $[[NH_3]]/[[NH_4^+]]=10^(-0.09)=0.813$ And given that $[NH_3]=0.10*mol*L^-1$, $[NH_4^+]=0.123*mol*L^-1$. Because the volume of the solution was specified to be...
1 Answers 1 views
When 150 g of ammonium nitrate dissolves in 450 g of water, the temperature of the solution decreases from 22 °C to 6.9 °C. What is the enthalpy of solution in joules per gram of ammonium nitrate?
There are two heat transfers involved in this problem. $"heat of solution of NH"_4"NO"_3 + "heat lost by water" = 0$ $color(white)(mmmmmmm)q_1color(white)(mmmmml) +color(white)(mmmm) q_2color(white)(mmmm) = 0$ $color(white)(mmmmml)m_1Δ_text(sol)Hcolor(white)(mmmll) + color(white)(mmll)m_2CΔT color(white)(mm)=...
1 Answers 1 views