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Potassium hydrogen phthalate is commonly used as a standard in acid-base titrations. Consider the following situation: 3 drops of phenolphthalein are added to a 25mL sample of unknown KHP concentration. The solution is then titrated with 0.012M Ca(OH)2. After 39.6mL of base is added the acid solution turns pink. Calculate the experimental value for Ksp for KHP and determine whether it is within 10% of the theoretical Ksp value (solubility = 8.0g/L). If not, give one reason why this error might have occurred.
what is the concentration of fructose in the resulting solution in uM? C) If you make three serial 1:5 dilutions, using the solution above, what is the concentration of the final solution?
Cobalt-60, which undergoes beta decay, has a half life of 5.26 years.
water expands when it freezes. How much work is done by 100g of water expanding as it freezes at 0 degrees Celsius and pushes back the wall of a pipe that exerts 1070 atm of pressure?
If a student determined that the circumference of a balloon filled by the boiling point of liquid nitrogen was 45 cm, what volume of nitrogen gas has been generated?
a solution of 8.32g of paba in 150g of chloroform boiled at 62.62C. what is the molecular mass of paba?
Each of 2 front tire in the car is filled with a different gas. One tire contains 116g of helium, another tire has 160g of unknown gas. How many times heavier is a molecule of the unkown gas than an atom of helium.
72.0 mL of a 1.40 M solution is diluted to a volume of 278 mL. A 139-mL portion of that solution is diluted using 161 mL of water. What is the final concentration.
If a solution of sodium chloride contains 5.2 NaCl in 900 grams of water. What is the concentration of the solution in parts per million?
A solution of H2SO4(aq) with a molal concentration of 5.25 m has a density of 1.266 g/mL. What is the molar concentration of this
What is the Kb of C5H5N? The pH is 10.82 and the amount of C5N5N is 1.0X10^-3
What is the molecular formula of a product obtained by adding fluorine to 1-butene and then cracking out
An aqueous solution is made by dissolving 25.8 grams of magnesium nitrate in 395 grams of water. What is the molality of magnesium nitrate.
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