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- The same student wanted to determine the heat of dissolution for potassium chlorate (KClO3, MW: 122.55 g/mol) in water. He measured 10 grams of KClO3 and dissolved it in a calorimeter containing 250 g of water. The temperature drop was 3.5 K. A . What is qH2O in Joules? B. What is qdissolution in Joules? C. What is the ΔHdissolution in kilojoules per mole?Given that the relative molecular mass of potassium chloride (KCl) is 74.5513 g mol-1, calculate the concentration of potassium chloride solution which will be iso-osmotic with tears (305 mOsM). State your answer in both molar concentration (mol/L) and in percentage (g/100 mL). Please answer very soon will give rating surelyChoose the FALSE statement An indicator can be used to monitor a buffer range When pH equals PKa of weak acid, the buffer capacity is the greatest Polyprotic acids have multiple stoichiometric points in their titration curve At the mid-point of titration of weak acid by strong base, the pH of the solution -does not equal the pKa of the weak acid The moles of titrant equals moles of titrate
- Serum osmolality increases by about ____ mOsm/kg for each 60 mg/dL increase in serum ethanol. a. 1 mOsm/kg b. 10 mOsm/kg c. 15 mOsm/kg d. 20 mOsm/kgThe pHpH scale for acidity is defined by pH=−log10[H+] where [H+]is the concentration of hydrogen ions measured in moles per liter (M). A solution has a pH of 10.2. Calculate the concentration of hydrogen ions in moles per liter (M).Calculate the pH of a buffer that contains 0.15 M MOPS anionic form and 0.25M MOPS zwitterion. The pKa is 7.2
- Buffer systems can absorb hydrogen ions from the blood to increase pH into homeostatic range (pH: 7.35 to 7.45)During what condition would buffer systems do this?The normal range of the sodium electrolyte in the body is 134 to 145 mEq/L. The term mEq is dependent on the charge of the ion. Since sodium is a +1 ion, 134 mEq/L is the same as 134 mmol/L. An ion that has a greater positive or negative charge; however, will have 1 mEq for each positive or negative charge of the ion for every 1 mmol. For example, for Ca+2, 2mEq/1mmol. If the standard range of Magnesium in the body is 0.70 to 0.95 mmol/L, convert this value into mEq/L for the Mg2+ ion. (Use dimensional analysis to figure this out)Solution Initial Mass (g) Final Mass (g) Change in Mass (g) % Sucrose Red 1.88 1.79 -0.09 Orange 1.92 0.95 -0.97 Yellow 1.95 2.40 +0.45 Green 2.00 1.35 -0.65 Blue 1.89 2.90 +1.01 Purple 1.90 2.05 +0.15 First: Calculate the change in mass for each apple block in grams (g) and write it in the chart. Include a “+” or “–” sign to signify a gain or loss in mass. Second: According to Jasmine’s lab directions, she should have created the following sucrose solutions: 0%, 5%, 10%, 15%, 20% and 25%. Using the changes in mass, determine which color solution has which percent sucrose and fill in the answers in the chart.
- 5. Your pharmacy has on hand Augmentin 125 mg/5 mL suspension.You receive a prescription for Augmentin 125 mg/5 mL suspension. Give 1 ½ tsp q8h x 5 days. How many milliliters of suspension would you dispense for a 5 day supply? Convert the total mL to dispense from the question above into ounces. How many ounces would you dispense?A 5% dextrose is isoosmotic to plasma. What effect would infusion of 1L of a 5% dextrose solution have on ECF and ICF volumes? How it would affect body fluid osmolality of a 70 kg individual and why?Sodium ions are found in the extracellular fluid (ECF) in a concentration of 150 mM. How many grams per liter is this? _________ g/L