Answer:
C.
Explanation:
Exothermic means the energy of products is lower than energy of reactants. Transition state will always be the highest energy among the two.
Answer: The formic acid is 3.5 times stronger than acetic acid.
Explanation:
The strength of an acid depends on its acid dissociation constant.
For a hypothetical monoprotic acid HA, the dissociation equilibrium is:
More is the value of , greater is the dissociation and stronger is the acid.
Thus formic acid is 3.5 times stronger than acetic acid.
A Thermochemical Equation is a balanced stoichiometric chemical equation that includes the enthalpy change, ΔH. In variable form, a thermochemical equation would look like this:
A + B → CΔH = (±) #
Where {A, B, C} are the usual agents of a chemical equation with coefficients and “(±) #” is a positive or negative numerical value, usually with units of kJ.
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Answer:
c. Cr
Explanation:
The compound is containing ion.
If acid reacts with it, CO_2 evolves.
therefore, Cr would form a precipitate when added to an aqueous solution of this compound. Cr2CO3 is the precipitate.
<span>Silver nitrate (AgNO3) is a colorless solution . when we add silver nitrate to dilute HCl we get a white precipitate of silver chloride
But here as you employed a concentrated hydrochloric acid initially the precipitate of silver chloride is formed but it immediately dissolves in HCl leaving a colour less solution
it all depends on the amount of HCl taken and amount of silver nitrate added to it
if we add equimolar quantities of both we will get a clear solution
if we add excess of silver nitrate we will get a small amount of white precipitate
AgNO3(solution) + Conc.HCl ----------> AgCl(Solution) + HNO3
AgNO3 (excess) + Conc.HCl --------> AgCl(Small white ppt) + HNO3</span>