Answer:
El cambio ocurre a causa de que los iones reaccionan y producen un cambio en la disposición de los átomos que se encuentran presentes en el indicador.
(4.50x10^16)/(6.02x10^24) = 7.5mols
7.5mols x 39.1= 293.25grams
Answer:
CuO + 2HCl = CuCl2(s) + H2O(l)
1 molecule of CuO reacts with 2 moles of HCl to form 1 mole of Copper II chloride and 1 mole of HCl
Answer:
0.321 M
Explanation:
The neutralization reaction of HCl with NaOH is the following:
HCl(aq) + NaOH(aq) → NaCl(aq) + H₂O(l)
So, <u>1 equivalent of HCl</u> reacts with <u>1 equivalent of NaOH</u>. In this case:
1 equivalent HCl = 1 mol HCl
1 equivalent NaOH = 1 mol NaOH
At the equivalence point, the amount of HCl reacts completely with the added amount of titrant (NaOH). As 1 mol of reactant is calculated from the product of the molarity of the solution and the volume, in the equivalent point:
moles HCl = moles NaOH
M(HCl) x V(HCl) = M(NaOH) x V(NaOH)
We have:
M(NaOH) = 0.150 M
V(NaOH) = 21.4 mL = 0.0214 L
V(HCl) = 10.0 mL = 0.01 L
Thus, we calculate the initial concentration HCl as follows:
M(HCl) = (M(NaOH) x V(NaOH))/ (V(HCl))
= (0.150 M x 0.0214 L)/(0.01 L) = 0.321 M
I believe the correct answer from the choices listed above is option A. The reactant for the given chemical reaction would be NaHCO3 and HCl. <span>A </span>reactant<span> is a substance that changes in a chemical reaction. It is the starting material in a reaction. Hope this answers the question.</span>
