Answer:
storage solution , deionized water, stabilizes
Explanation:
A pH meter is a scientific device or instrument that is used to measure the pH of a given aqueous solution thereby determining the nature of the solution whether it is acidic or basic or neutral.
While using the pH meter or taking the measurement using the pH meter --
- it should be kept in a storage solution for effective working.
- Before using the device, it is rinsed with a deionized water and pat dry.
- Record the measurements when the pH meter stabilizes.
Answer:
None of the options are correct
Explanation:
Ketone is an organic compound with general formula RCOR' ie RC=OR where R and R' are alkyl groups. Example of ketone can be written as:
C—C—C=O—C
Answer:
pH = 4.78
Explanation:
<em>There are titrated 65.8mL of a 0.7600M of acetic acid</em>
The reaction of acetic acid, CH₃COOH, with NaOH is:
CH₃COOH + NaOH → CH₃COONa + H₂O
Initial moles of acetic acid are:
0.0658L ₓ (0.7600mol / L) = 0.05000 moles of CH₃COOH
Moles of NaOH added to the acid solution are:
0.0784L ₓ (0.3500mol / L) = 0.02744 moles of NaOH = Moles of CH₃COONa produced -<em>Because NaOH is the limiting reactant-</em>
That means after the reaction moles of CH₃COOH and moles of CH₃COONa are:
CH₃COOH: 0.05000 mol - 0.02744 mol = 0.02256 moles
CH₃COONa: 0.02744 moles
Using H-H equation for acetic acid, pH of the solution is:
pH = 4.70 + log₁₀ [CH₃COONa] / [CH₃COOH]
Replacing:
pH = 4.70 + log₁₀ [0.02744] / [0.02256]
<h3>pH = 4.78</h3>
The answer is astronomy. There is no ÓLOGY´ at the end of it.