The pH of the solution is 4.38.
<h3>What is the pH?</h3>
The first thing that we must do is to set up the ICE table for the reaction as shown;
Given that;
HA = 1.8 M
HA(aq) + H2O(l) ⇔ H3O^+(aq) + A^-(aq)
I 1.8 0 0
C - x +x +x
E 1.8 - x x x
K = [H3O^+] [A^-]/[HA]
9.55 × 10^−10 = x^2/0.0158 - x
9.55 × 10^−10(1.8 - x ) = x^2
1.719 * 10^-9 - 9.55 * 10^-10x = x^2
x^2 + 9.55 * 10^-10x - 1.719 * 10^-9 = 0
x=0.000041 M
pH = -log(0.000041 M)
pH = 4.38
Learn more about pH:brainly.com/question/15289741
#SPJ1
The balanced equation for the reaction between Mg and HCl is as follows
Mg + 2HCl --> MgCl₂ + H₂
stoichiometry of HCl to H₂ is 2:1
number of HCl moles reacted - 0.400 mol/L x 0.100 L = 0.04 mol of HCl
since Mg is in excess HCl is the limiting reactant
number of H₂ moles formed - 0.04/2 = 0.02 mol of H₂
we can use ideal gas law equation to find the volume of H₂
PV = nRT
where
P - pressure - 1 atm x 101 325 Pa/atm = 101 325 Pa
V - volume
n - number of moles - 0.02 mol
R - universal gas constant - 8.314 Jmol⁻¹K⁻¹
T - temperature in Kelvin - 0 °C + 273 = 273 K
substituting these values in the equation
101 325 Pa x V = 0.02 mol x 8.314 Jmol⁻¹K⁻¹ x 273 K
V = 448 x 10⁻⁶ m³
V = 448 mL
therefore answer is
c. 448 mL
Answer:
an element.
Explanation:
When all the atoms contain a nucleus with the same amount of protons then each atom is classified as the same element. Hence multiple atoms and a larger quantity of atoms of the same element is still just the same single element.
Mass/moles x mr
so you need to work out the rfm of Ca(OH)2= 40(16+1)2= 40+34= 74
and then use the formula= moles x mr
6.25 x 74= 462.5
Answer= 462.5g
Solar core I think... i hope it helps
