The concentration of PO43 ions in (M) found in a solution of 3 M H3PO4 is (Ka1= 7.1X10-3, K,2= 6.3X10-8 and Ka3= 4.2X10-13) 6.4 X 10-8 O 5.2 X 10-14 Ο 1.9 Χ 10-19 O 3.7 X 10-23 0.14
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- A technician is setting up a laboratory to standardise ~0.0200 mol dm–3 KMnO4. What mass of Mohr’s salt [FeSO4(NH4)2SO4·6H2O] would the technician be required to weigh out to produce a 5.00 L solution of Mohr’s salt such that 25.0 cm3 aliquots of the salt would require a titre of 20.0 cm3 to standardise the KMnO4 solution?Hydrogen bromide is a strong electrolyte in water. What is the boiling point elevation of asolution containing 125.0 g of HBr in 1.75 kg of water? Given the following: H= 1,0 g/mol;Br= 79.9 g/mol; boiling point elevation of water is 0.512°C.kg/molA. 1.24 °0B. 101.24 °CC. 0.904 °CD. 100.904 °CGiven: 0.35g NaCl, 0.25 g NaHCO3, 0.15 g KCl & 2 g C6H12O6 are present in 100 mL ORS solution (MW: Na: 23, K: 39, Cl: 35, H: 1, C: 12, O: 16) Calculate the total amount of chloride expressed in mmol/L present in the prepared solution 60.34 mmol/L 90.10 mmol/L a 111.11 mmol/L b 29.76 mmol/L c 80.61 mmol/L d 20.27 mmol/L
- If 0.15g of Calcium hydroxide is needed in preparing 50mL of Calcium hydroxide topical solution, calculate the amount of calcium oxide (56g/n) needed in preparing 50 mL of the calcium hydroxide (74g/n) topical solution. CaO + + H2O → Ca(OH)2 reacting ratio: 1 mol CaO = 1mol Ca(OH)2 a 0.20 g b 0.19g c 0.11g d 0.25gPrepare astandared solution of potasstum carbonate K2CO3 2.5M in 200ml of water atomic weight K=39.098 ,O=16 ,C=12Given: 0.35g NaCl, 0.25 g NaHCO3, 0.15 g KCl & 2 g C6H12O6 are present in 100 mL ORS solution (MW: Na: 23, K: 39, Cl: 35, H: 1, C: 12, O: 16) a. Calculate the total amount of glucose expressed in mmol/L present in the prepared solution b. Calculate the total amount of sodium expressed in mmol/L present in the prepared solutionc. c. Calculate the total amount of potassium expressed in mmol/L present in the prepared solution a 111.11 mmol/L b 90.10 mmol/L c 80.61 mmol/L d 60.34 mmol/L e 29.76 mmol/L f 20.27 mmol/L
- How many moles of calcium fluoride (78.07 g/mol) will dissolve in 10.0 L of water at 25°C? Ksp of CaF2 is 3.9 x10-11 0.167 0.00214 2.36 x 10-4 6.24 x 10-6Given: 0.35g NaCl, 0.25 g NaHCO3, 0.15 g KCl & 2 g C6H12O6 are present in 100 mL ORS solution (MW: Na: 23, K: 39, Cl: 35, H: 1, C: 12, O: 16) Calculate the total amount of bicarbonate expressed in mmol/L present in the prepared solution a 90.10 mmol/L b 80.61 mmol/L c 29.76 mmol/L d 60.34 mmol/L e 111.11 mmol/L f 20.27 mmol/LWhat mass of Na3PO4・12H2O would be needed to prepare 0.250L of a solution in which the Na+ ion concentration in 0.250 moles per liter?
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