Answer:
To facilitate a swifter reaction, remove the outer sodium oxide layer that has developed
Explanation:
The rationale for not utilizing a paper towel to dab your metal is:
Eliminate the outer sodium oxide layer that has formed to enable a quicker reaction.
Dabbing involves applying quantities of a cannabis concentrate that vaporizes on a heated surface.
Using an ordinary paper towel to dab that metal won’t effectively remove the outer oxide layer.
Answer:
3.24 × 10^5 J/mol
Explanation:
To determine the activation energy for this reaction, the following equation is utilized:
ln(k2/k1) = Ea/R x (1/T1 - 1/T2)
Where; Ea is the activation energy (J/mol)
R represents the ideal gas constant = 8.3145 J/Kmol
T1 and T2 correspond to absolute temperatures (K)
k1 and k2 denote the reaction rate constants at the given temperatures
Initially, temperatures measured in °C must be converted to K
T(K) = T(°C) + 273.15
T1 = 325°C + 273.15
T1 = 598.15K
T2 = 407°C + 273.15
T2 = 680.15K
Given that k1= 8.58 x 10-9 L/mol, k2= 2.16 x 10-5 L/mol, and R= 8.3145 J/Kmol, we can now calculate Ea
ln(k2/k1) = Ea/R x (1/T1 - 1/T2)
ln(2.16 x 10-5/8.58 x 10-9) = Ea/8.3145 × (1/598.15 - 1/680.15)
ln(2517.4) = Ea/8.3145 × 2.01 × 10^-4
7.831 = Ea(2.417 × 10^-5)
Ea = 3.24 × 10^5 J/mol
B. Verify a hypothesis by collecting evidence
Honestly, who thinks "oh there's a clear liquid in the lab? It must be water."
To determine the acidity of a
solution, we need to compute the pH value. The formula for calculating pH is as follows:
<span>pH = - log [H+] where H+ is expressed in Molar</span>
We have H+ = 3.25 × 10-2 M
Thus, the pH is:
pH = - log [3.25 × 10-2]
pH = 1.488
Because the pH is significantly less than 7, the solution is acidic.
To calculate the concentration of OH-, it is important to remember that the product of H+ and OH- equals 10^-14. So
[H+]*[OH-] = 10^-14 <span>
</span>[OH-] = 10^-14 / [H+]
[OH-] = 10^-14 / 3.25 × 10-2
[OH-] = 3.08 × 10-13 M
Answers:
Acidic
[OH-] = 3.08 <span>× 10-13 M</span>
