4. pH Calculations. Show all work and round to the correct number of significant figures. a....
5. Concentration Calculations. Show all work and round to the correct number of significant figures. a. The pH of a solution is 12.76. What is the hydronium ion concentration? c. What is the hydroxide ion concentration?
Show your work, include units, and report the correct number of significant figures for all calculations. 1. The molal freezing point depression constant (K) for p-dichlorobenzene is 7.10°C/m and its normal freezing point (f.p.) is 53.10°C. When 0.209 g of an unknown solute is dissolved in 4.00 g of p-dichlorobenzene, the f.p. is lowered to 50.20°C. Refer to the Introduction and Data Sheet to solve the following problems. °C. a) The f.p. depression (AT) is b) Calculate the molality (m)...
please answer all, and type please Problems and questions (show all calculations, correct significant figures and units) 1. Why is it important to test the crucible for cracks before heating it? 2. Write the correct balanced equation for the dehydration (removal of water) of the magnesium sulfate hydrate obtained in Procedure B of this experiment. 3. How many moles are in 70.0 grams of potassium hydroxide? 4. A compound is formed when 0.300 moles of barium combine with 0.600 moles...
Round all answers to the correct number of significant figures. What are [H_3O^+], [OH^-], and pOH in a solution with a pH of 3.26?
1 and 2 On Calculations you must SHOW YOUR WORK to get credit. s the concentration (M) of hydronium ions in a solution at 25°C with pH 3.529? Report with correct significant figures. (10 points) What is the Ksp of MgF2 if its molar solubility is 2.65x10-4 M? (10 points)
please answer all and show all the work. thanks Show the correct number of significant figures and units for all measurements and calculations. A. Empirical formula Mass of crucible and lid 14.59289 14.95279 Mass of crucible, lid, and magnesium Appearance of magnesium ribbon: Appearance of product: 15, 11999 Mass of crucible, lid, and product Calculations (Show your work) Mass of magnesium ribbon (show calculations) Mass of magnesium oxide product (show calculations) Mass of oxygen (show calculations) Number of moles of...
What is the pH to the correct number of significant figures for solutions with the following concentrations of H3O+ or OH−? [OH−] = 5.0×10−3 M pH= [H3O+] = 10−8 M pH= [H3O+] = 4.0 M . pH=
JUS Date Section 01 02 For full credit, please show all work clearly and give answers to the correct number of significant figures. This quiz will be chie at the start of class on Friday November 8, 2019 1. per total) a. What are the hydronium ion concentration and the hydroxide ion concentration in pure water? (OH) - b. Write the equilibrium constant expression for pure water, including its value. K, c. What are the pH and pOH values for...
Show your work. Use the correct number of significant figures in your answers. Aluminum metal reacts with chlorine gas to form solid aluminum chloride. 1. Write the balanced equation including states of matter. 2. If 70.0 grams of aluminum reacts with excess chlorine gas, how many grams of aluminum chloride will form? 3. How many grams of chlorine will react completely with 85.6g of aluminum? Sodium hydroxide reacts with sulfuric acid to produce water and sodium sulfate. 4. Write the...
carry out the following calculations and round your answer to the correct number of significant figures. 123.45x6.7+8.9