1 answer

16. Calculate the molarity of K+ ions in 0.76 g K3PO4 in 125 mL of solution

Question:

16. Calculate the molarity of K+ ions in 0.76 g K3PO4 in 125 mL of solution

16. Calculate the molarity of K+ ions in 0.76 g K3PO4 in 125 mL of solution

Answers


Molar mass of K3PO4,
MM = 3*MM(K) + 1*MM(P) + 4*MM(O)
= 3*39.1 + 1*30.97 + 4*16.0
= 212.27 g/mol


mass(K3PO4)= 0.76 g

use:
number of mol of K3PO4,
n = mass of K3PO4/molar mass of K3PO4
=(0.76 g)/(2.123*10^2 g/mol)
= 3.58*10^-3 mol
volume , V = 1.25*10^2 mL
= 0.125 L


use:
Molarity,
M = number of mol / volume in L
= 3.58*10^-3/0.125
= 2.864*10^-2 M

This is concentration of K3PO4
[K+] = 3*[K3PO4]
= 3*2.864*10^-2 M
= 8.59*10^-2 M
Answer: 8.59*10^-2 M

.

Similar Solved Questions

1 answer
Question iii 10. An electrochemical cell consists of a standard Fe/Fe electrode (Fe (aq) (1.OM) IFe...
question iii 10. An electrochemical cell consists of a standard Fe/Fe electrode (Fe (aq) (1.OM) IFe (aq) (1.0M) IPt(s) and a copper metal electrode ( concentrations) Cu2 (aq) +2e Cu(s) Fe (aq) le Fe (aq) +0.34 V -034 +0.77V Mark what is the corect balanced equation for the spontaneous reac u (aq)...
1 answer
(1 point) When a poultry farmer uses his regular feed, the newborn chickens have normally distributed...
(1 point) When a poultry farmer uses his regular feed, the newborn chickens have normally distributed weights with a mean of 61.4 oz. In an experiment with an enriched feed mixture, ten chickens are born with the following weights (in ounces). 66.8, 65.9, 64.2, 65.2, 64.1, 64.1, 69.8, 65.3, 63, 65.7...
1 answer
Bramble Corporation had net sales of $5,060,000 and interest revenue of $86,000 during 2017. Expenses for...
Bramble Corporation had net sales of $5,060,000 and interest revenue of $86,000 during 2017. Expenses for 2017 were cost of goods sold $3,120,000; selling expenses $434,000; administrative expenses $550,000; and interest expense $23,000. Bramble’s tax rate is 40%. The corporation had 560,000 s...
1 answer
Newkirk, Inc., is an unlevered firm with expected annual earnings before taxes of $22.7 million in...
Newkirk, Inc., is an unlevered firm with expected annual earnings before taxes of $22.7 million in perpetuity. The current required return on the firm's equity is 15 percent, and the firm distributes all of its earnings as dividends at the end of each year. The company has 1.47 million shares of...
1 answer
17. -11 points CurrenMedMath11 10.5.042. Refer to the Pfizerpeno label to answer the following question. My...
17. -11 points CurrenMedMath11 10.5.042. Refer to the Pfizerpeno label to answer the following question. My Notes Ask Your Teacher Label 6505-00-664-7116 100.000 80 000 MADE IN USA of potency without significant loss refrigerator for one (1) wook IN DRY FORM Sterile solution may be kept in STORE BEL...
1 answer
Required information [The following information applies to the questions displayed below.] Bunnell Corporation is a manufacturer...
Required information [The following information applies to the questions displayed below.] Bunnell Corporation is a manufacturer that uses job-order costing. On January 1, the company's inventory balances were as follows: Raw materials Work in process Finished goods $ 40,000 $ 18,000 $ 35,000 Th...
1 answer
1. Alan Dershowitz, a law professor famous for his wealthy clients (O. J. Simpson among others),...
1. Alan Dershowitz, a law professor famous for his wealthy clients (O. J. Simpson among others), joined with other lawyers to open a kosher delicatessen, Maven's Court. Dershowitz met with greater success at the bar than in the kitchen-the deli failed after barely a year in business. One supplie...
1 answer
A woman accidentally drops a flowerpot fro a windowsill at a height d above the street...
A woman accidentally drops a flowerpot fro a windowsill at a height d above the street towards a man of height h standing below. The woman calls out to the man in just enough time for the man to move out or the way r the man needs a tine interval or Δ1 to respond to the warning, at what height...
1 answer
Question 20 O out of 5 points Name this compound. 3 out of 6 points Question...
Question 20 O out of 5 points Name this compound. 3 out of 6 points Question 21 OH H2SO4 heat The name of the Major product of this reaction is Al The name of the minor product of this reaction is [B]...
1 answer
Problem 15-4A On December 31, 2017, Belagio Holdings Ltd. issues 6 percent, 10-year convertible bonds with...
Problem 15-4A On December 31, 2017, Belagio Holdings Ltd. issues 6 percent, 10-year convertible bonds with a maturity value of $6,000,000. The semi-annual interest dates are June 30 and December 31. The market interest rate is 5 percent and the issue price of the bonds is 107.79458. Belagio Holdings...
1 answer
QUESTION 6 Ang company that produces pleasure boats has decided to expand one of its lines....
QUESTION 6 Ang company that produces pleasure boats has decided to expand one of its lines. The company is considering three Location alternatives. The cost structure for each location is given as shown in the table. Location Fixed Cost/yr variable cost/unit L1 13,515 2.3 L2 ...
1 answer
Maria’s findings from the diagnostic test and lab test confirm the medical diagnosis of end-stage renal...
Maria’s findings from the diagnostic test and lab test confirm the medical diagnosis of end-stage renal disease. Other assessment findings include, +1 pitted edema, bilateral crackles in the lungs, and clear pale urine. Vital signs: T - 98.8, P - 86, R - 28, and BP - 178/92. Which additional a...
1 answer
How far does a bus travel in 4 hours at 55 mph?
How far does a bus travel in 4 hours at 55 mph?...
1 answer
2. Describe how wearing a corset could affect pulmonary ventilation and alveolar ventilation rate. Include Boyle's...
2. Describe how wearing a corset could affect pulmonary ventilation and alveolar ventilation rate. Include Boyle's law, as well as the pressures and physical structures that are involved....
1 answer
Derive the transfer function, vo/vi(s), in terms of G1, G2, G3, G4, G5 where Gį =...
Derive the transfer function, vo/vi(s), in terms of G1, G2, G3, G4, G5 where Gį = 1/Zį. Z2 N Via Z1 Z3 ο νο a. Derive the transfer function, vo/vi(s), if Z1 = R1, Z2 = R2,23 = R3 (i.e., resistors) and 24 = 1/sC1,25 = 1/sC2 (i.e., capacitors). b. Using Excel/Matlab/Python...
3 answers
How did athens become rich
how did athens become rich?...