Rate and mechanism of the reaction of Mg and HCl
2014年3月7日 · $$\ce{rate = k * [H3O+] }$$ Because it is the concentration of the $\ce{H3O+}$ which determines the formation of the Mg ions. From there, I would assume, the $\ce{Mg^{2+}}$ and the $\ce{Cl-}$ would remain in solution, as the reaction is carried out in the acid, obviously consisting of water. From this, can I say that the rate law for the reaction
Calculating the heat of reaction for Mg metal and HCl
$\pu{-44.4 kJ}$ is the value calculated based on the moles of Mg reacted. However, I suspect that the given answer is wrong because the balanced equation does not yield a 1:1 reaction ratio between $\ce{Mg}$ and $\ce{HCl}$, which means that $\ce{HCl}$ is the limiting reactant, which would make the Heat of Reaction Larger.
experimental chemistry - Reaction between magnesium and …
2016年11月23日 · The reaction is exothermic because the energy absorbed in breaking bonds is smaller overall than the energy released in making bonds (and exothermic by definition is a negative enthalpy). Even though these numbers are approximate, they are clearly different enough to make such a conclusion.
Mechanism for reaction between hydrochloric acid and magnesium
2016年1月10日 · Since H is an intermediate, you can substitute for this intermediate from earlier steps and you will end up with Rate = (k3.k1.k2.[Mg][H+]^2)/[Mg2+] and if [Mg]/[Mg2+] is constant as the reaction of a solid always happens at the surface, you can get a rate law = k [HCl]^2
How does the temperature of HCl affect the reaction rate of HCl
2022年3月4日 · When I increase the temperature of HCl, the time it took for Mg to dissolve in HCl became longer. I put 0.1g of Mg into 50ml of HCl and repeat that 4 times. I heat the HCl to 20, 40, 60, and 80 degrees Celsius in 4 separate beakers. Then, I put 0.1g of Mg into it, and the time it took to dissolve completely was 22, 25, 29 and 29 seconds.
thermodynamics - Why is change in entropy negative and change …
2019年3月6日 · $$\ce{Mg(s) + 2 HCl(aq) -> H2(g) + MgCl2(aq) + Heat}$$ From a conceptual standpoint, shouldn't the change in entropy be positive for this reaction because there are more moles of gas in the products vs the reactants? Why is this not the case?
Find ΔHr for HCl + Mg Reaction - Chemistry Stack Exchange
2015年9月13日 · Find ΔHr for HCl + Mg Reaction. Ask Question Asked 9 years, 4 months ago. Modified 9 years, 2 months ago.
Basic chemistry of the Shinoda test for flavonoids?
If they are present in the test sample then they are reduced to anthocyanidins under the Shinoda reaction conditions as shown below. The conjugation in flavinoid compounds produces a yellow color, while the extended conjugation in the resultant anthocyanidin shifts the color further out to the red region of the visible spectrum.
Does changing the volume of a reactant affect the rate of reaction ...
2016年4月7日 · Mg and HCl forms a metal salt MgCl and produces Hydrogen gas. There may be a very slight increase in rate of reaction but this is permissible/ very negligible due to the fact that metals and acids form adducts and these can further react/ delay further reactions between the acid and metal molecules.
physical chemistry - How different concentration of HCl on …
2015年5月29日 · From the data I collected, I noticed that the reaction with $1\ \mathrm{mol/L}$ $\ce{HCl}$ produced the most energy and the reaction with $3\ \mathrm{mol/L}$ $\ce{HCl}$ the least. I just wanted to know if my data is correct or not because I hypothesized that the $3\ \mathrm{mol/L}$ reaction would produce the most heat energy.