A pH meter reads 0.572 V when immersed in a buffer known to have a pH of 3.00. W

Question

A pH meter reads 0.572 V when immersed in a buffer known to have a pH of 3.00. What is the pH of an unknown solution if the meter reads 0.483 V? (a) 4.50 (b) 1.50 (c) 2.91 (d) 3.09 Just as propanol was added to our GC experiment (the "Beer Lab") as an internal quantitative standard, so is indium often added to ICP-MS when quantitation is required in a mass spectrometric experiment. An unknown Fe solution is spiked with 10.00 ppm In solution. If the peak height of the In peak is 2.07 cm, what is the Fe concentration if its peak height is 1.53 cm? (a) 13.53 ppm (b) 10.00 ppm (c) 7.39 ppm (d) 0.32 ppm Which of the following is an advantage in running your sample as a solution in IR spectroscopy? (a) no interfering peaks from solvent (b) solution is quantitative (can determine unknown concentration) (c) does not require a special sample holder (d) all materials are soluble in solution A magnetic sector analyzer is calibrated such that a 100 V accelerating potential will focus an m/z of 20 amu. What accelerating potential is required to focus a mass of 150 amu? (a) 13.3 V (b) 30 V (c) 274 V (d) 750 In what war did the Halifax Explosion take place? (a) War of 1812 (b) World War I (c) Korean War (d) Feast of Maximum Occupancy

Explanation / Answer

Multiple choice

(v) If pH meter read 0.483 for unknown solution, the pH of the solution would be,

c) 2.91

(vi) The Fe concentration = 1.53 x 10/2.07

(c) 7.39 ppm

(vii) The given is an advantage while running IR in solution phase,

(c) does not require a special sample holder

(viii) The accelerating potential needed to focus 150 amu would be,

(b) 30 V

Bonus : The halifas explosion occured during,

(b) World War I

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.