Answer:
1.62x10⁻³ moles of NaOH were dispensed
Explanation:
Molarity is an unit in chemistry defined as the ratio between moles of solute (In the problem, NaOH), per liter of solution.
The concentration of the solution is 0.125moles per liter. That means 1L of solution has 0.125 moles of NaOH.
The volume you dispensed in the buret was:
15.67mL - 2.73mL =
12.94mL of the 0.125M NaOH are:
12.94mL = 0.01294L * (0.125moles / L) =
<h3>1.62x10⁻³ moles of NaOH were dispensed</h3>
A. 599 mg x 1g/1000mg x 1mole/174.24g = 0.003438 moles
<span>b. 0.003438 moles x 1000 mmoles/mole = 3.438 moles </span>
<span>c. 0.003438 moles/0.741 L = 0.0046 M </span>
<span>d. [K+] = 2 x 0.0046 = 0.0092 M because each mole K2 SO4 yields 2 moles K+ </span>
<span>e. [SO42-] = 0.0046 M </span>
<span>f. 599 mg/0.741 L = 808.4 mg/L = 808 ppm </span>
<span>g. 0.599g/741 ml x 100 ml = 0.08 g/100 ml = 0.08% w/v </span>
<span>h. pK+ = -log [K+] = -log 0.0092 = 2.04 </span>
<span>i. pSO42- = -log [SO42-] = -log 0.0046 = 2.34</span>
Answer:
The enthalpy of neutralization and its relation to esterification is explained below in details.
Explanation:
The conventional enthalpy variation of neutralization is the enthalpy exchange when extracts of an acid and an alkali respond together under conventional circumstances to generate 1 mole of water. Remark that the enthalpy change of neutralization is always estimated per mole of water produced.
Answer:
What is the following?
Explanation:
I think I can answer this, I recognize the question
2.9 is the ph of a buffer solution made by adding 0. 010 mole of solid naf to 50. ml of 0. 40 m HF.
pH
The hydrogen ion concentration in water is expressed by pH. Specific to aqueous solutions, pH is the negative logarithm of the hydrogen ion (H+) concentration (mol/L):
pH equals -log(H+)10
The phrase refers to a solution's basicity or acidity in a range of 0 to 14, with pH 7 representing neutrality. The pH decreases and acidity rise as the concentration of H+ ions in the solution.
Since pH is a logarithmic function, a pH shift of one unit (for example, from 7 to 6) corresponds to a 10x change in the concentration of H+ in the solution. However, hydrogen ion activity, not concentration, is what is actually measured.
To learn more about pH refer here:
brainly.com/question/15239039
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