A chemistry graduate student is glven 300. mL. of a 0.10M nitrous acid (HNO,) solutlon. Nitrous acid is a weak acid with K = 4.5 x 10 What mass of KNO, should the student dissolve In the HNO, solution to turn It Into a buffer with pH =3.15? You may assume that the volume of the solution doesn't change when the KNO, Is dissolved in It. Be sure your answer has a unit symbol, and round It to 2 significant digits.

A chemistry graduate student is given 450. mL of a 1.10M dimethylamine (CH.) NH) solution. Dimethylamine is a weak base with K,=5.4 × 10 4. What mass of (CH,),NH,CI should the student dissolve in the (CH,), NH solution to turn it into a buffer with pH = 10.89? You may assume that the volume of the solution doesn't change when the (CH,),NH,CI is dissolved in it. Be sure your answer has a unit symbol, and round it to 2 significant digits. ?

If 100.0 g calcium phosphate (Ksp= 1.3 x 10^-32) are placed in enough water to generate 750.0 mL of solution, calculate the molar solubility of the calcium phosphate solution and the molar solubility of the calcium ion if 30.0 mL of 0.400 M calcium nitrate solution is added to the original solution.

A chemistry graduate student is given 300. mL of a 1.30M hydrocyanic acid (HCN) solution. Hydrocyanic acid is a weak acid with K = 4.9 × 10 mass of KCN should the student dissolve in the HCN solution to turn it into a buffer with pH=9.51? -10 . What You may assume that the volume of the solution doesn't change when the KCN is dissolved in it. Be sure your answer has a unit symbol, and round it to 2 significant digits. Explanation 81°F Mostly sunny Check $ 0.0 X с с % S F6 Q Search F7 FB F9 F10 © 2023 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | A e c (4) D F11 *+ D F12 PrtSc Insert Delete

A chemistry graduate student is given 450. mL of a 0.60M propanoic acid (HC,H,CO,) solution. Propanoic acid is a weak acid with K,=1.3 × 10 °. What mass of KC, H,CO, should the student dissolve in the HC,H,CO, solution to turn it into a buffer with pH =4.80? You may assume that the volume of the solution doesn't change when the KC,H,CO, is dissolved in it. Be sure your answer has a unit symbol, and round it to 2. 2 significant digits. alo х10 Ar Explanation Check © 2022 McGraw Hill LLC. All Rights Reserved. Terms of Use| Privacy Center | Accessibility ................ . ..................... .....

A chemistry graduate student is given 250. mL of a 1.80 M dimethylamine ((CH3), NH) solution. Dimethylamine is a 2 -4 weak base with K = 5.4 × 10 What mass of (CH, NH,Br should the student dissolve in the (CH,) NH solution to 2 turn it into a buffer with pH = 11.26? You may assume that the volume of the solution doesn't change when the (CH,) NH,Br is dissolved in it. Be sure your 2 answer has a unit symbol, and round it to 2 significant digits.