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The substance Co(OH)3 is insoluble, and has a Ksp of 2.5 × 10–43. Calculate the concentration (solubility) of each ion in:
a. Pure water
b. A solution of 0.10M Co(NO3)2
The USS Ohio detects a signal at 96.9 MHz, 94.1 MHz, and at 108.9 MHz.
a. Which of these frequencies is the highest energy? Explain your answer by describing the relationship between energy and frequency of EMR
b. What is the wavelength of the signal at 108.9 MHz ? Show your work including all calculations and units.
SEP Interpret Data Look at the diagram. Imagine the following scenario: A factory where rock salt is kept in its liquid state loses power. The vat that contains the liquid rock salt begins to cool. The factory manager measures the temperature after 1 hour and again after 3 hours. Both readings show that the temperature of the salt is 801°C. What would you expect to see in the vat after 2 hours? Explain why you would expect to see this. Hint: Why would the temperature remain the same for 2 hours?
2. A buffer solution is prepared via adding solution A (Sodium dihydrogen phosphate 27.6 gm up to 1000mL distilled water) and solution B (Disodium hydrogen phosphate 5.362gm up to 100mL distilled water). During preparation, 1000 mL buffer is prepared via adding 80mL of solution B to 920mL of solution A. Show a theoretical approach to calculate the pH of the buffer solution.
1. A one-liter buffer solution was made of ammonia (0.33 M)-ammonium chloride (0.33 M) at equilibrium. A student was asked to add 0.05 mol HCl to that solution. However, he mistakenly added 0.07 mol NaOH to that solution. Assume no change in the volume of the buffer.
(a) What type of buffer solution it was. Provide its mechanism.
(b) Calculate the change of pH of the buffer after the mistake of the student
(c) What would be the change of pH if the student adds 1000 mL water to that buffer solution? [2+2+1]
To neutralize 100 g of HNO3 solution, 30 cm3 of 15% NaOH solution with a density of 1.15 g / cm3 was used. Calculate the mass fraction (in%) of nitric acid in the solution!
A buffer solution is prepared via adding solution A (Sodium dihydrogen phosphate 27.6 gm up to 1000mL distilled water) and solution B (Disodium hydrogen phosphate 5.362gm up to 100mL distilled water). During preparation, 1000 mL buffer is prepared via adding 80mL of solution B to 920mL of solution A. Show a theoretical approach to calculate the pH of the buffer solution
A buffer solution is prepared via adding solution A (Sodium dihydrogen phosphate 27.6 gm up to 1000mL distilled water) and solution B (Disodium hydrogen phosphate 5.362gm up to 100mL distilled water). During preparation, 1000 mL buffer is prepared via adding 80mL of solution B to 920mL of solution A. Show a theoretical approach to calculate the pH of the buffer solution
In a chemical reaction the final amount of the products is determined by the?
How much potassium nitrtae can be dissolved in 200 g of water at 40 degrees celcius
