Answer:
they are used to record the motion of the ground
Explanation:
the pH during the titration of 40.00 mL of 0.1000 M HCl after adding 50 mL of 0.1000 M NaOH is pH = 13.39
NaOH + HCl → NaCl + H2O
40.00 ml 0.5M NaOH solution
mol NaOH = 40 ml / 1000 ml / L * 0.5 mol / L = 0.02 mol NaOH
25 mL 0.1 M HCl
mol HCl = 25 mL / 1000 mL / L * 0.1 mol / L = 0, 0025 mol
This reacts with 0.0025 mol NaOH
[NaOH] = 0.269 M
[OH-] = 0.269 M
pOH = - log 0.269
pOH = 13.43
You titrate with 30 mL 0.100 M HCl
Mol HCl = 30 mL / 1000 mL/L * 0.100 mol /L = 0.003 mol HCl
This will react with 0.003 mol NaOH
Mol unreacted NaOH = 0.02 mol - 0.003 mol = 0.017 mol NaOH in 40mL + 30 mL = 70 mL solution
Molarity of NaOH solution = 0.017 mol / 70 mL * 1000 mL/L = 0.243 M
[OH-] = 0.243 M
pOH = - log 0.243
pOH = 0.61
pH = 13.39
40 mL
Titration is defined as "the process of determining the amount of substance A by adding a measured amount of substance B, which is a titrator that reacts until an accurate chemical equivalence point is reached."
Learn more about titration here: brainly.com/question/186765
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2H2S + 3O2 → H2O + SO2
We have 4 H on the left and 2 on the right
2 S on the left and 1 on the right
6 O on the left and 3 on the right
We need to multiply everything on the right by 2
Add a coefficient 2 before H2O and a 2 before SO2.
2H2S + 3O2 → 2H2O + 2SO2
4H 4H
2S = 2S
6O =2O
Balances
Answer:
The answer to your question is pH = 9.5
Explanation:
Data
pOH = 4.5
pH = ?
pH measures the hydronium concentration [H₃O⁺]. The scale of pH goes form 0 to 14. If the solution has a pH from 0 to 6.9 the solution is an acid, if the pH = 7, the solution is neutral and if the pH goes from 7.1 to 14 the solution is an alkali,
Formula
pH + pOH = 14
-Solve for pH
pH = 14 - pOH
-Substitution
pH = 14 - 4.5
-Result
pH = 9.5
The answer would be C. because if you burn coal can you get the same piece of coal back?