One method for chemical analysis involves finding a reactant that will precipitate the species of interest, but not the other species. The mass of the precipitate is then used to determine the mass of the species of interest present in the original sample. For example, calcium ions can be precipitated from an aqueous solution by adding of sodium oxalate Na2C2O4. The balanced equation is: Ca2+(aq) + Na2C2O4 (aq) --> CaC2O4 (s) + 2 Na+ (aq) Suppose you had a solution with approximately 15.0 g of calcium ions. Show by calculation whether the addition of 15.0 g of sodium oxalate will precipitate all of the calcium ions present in the sample.

3. Give the net ionic equation for the reaction (if any). that occurs when aqueous solutions of K2S and Fe(NO;)2 are mixed. A) K*(aq) + NO;(aq) – KNO;(s) B) No reaction occurs. C) Fe"(aq) + S³(aq) + 2 K^(aq) + 2 NO;(aq) → FeS(s) + 2 K“(aq) +2 NO;(aq) D) Fe"(aq) + S²(aq) + 2 K*(aq) + 2 NO;(aq) → Fe²"(aq) + s²(aq) + 2 KNO3(s) E) Fe2(aq) + S²-(aq) FeS(s)

Sodium hydrogen carbonate (NaHCO,), also known as sodium bicarbonate or "baking soda", can be used to relieve acid indigestion. Acid indigestion is the burning sensation you get in your stomach when it contains too much hydrochloric acid (HCI) , which the stomach secretes to help digest food. Drinking a glass of water containing dissolved NaHCO, neutralizes excess HCl through this reaction: HCl(aq) + NaHCO,(aq) NaCl(aq) + H,O(1) + CO,(g) The CO, gas produced is what makes you burp after drinking the solution. Suppose the fluid in the stomach of a woman suffering from indigestion can be considered to be 50. mL of a 0.019M HCl solution. What mass of NaHCO, would she need to ingest to neutralize this much HCI ? Be sure your answer has the correct number of significant digits. 10 Submit Assignment 2020 McGraw-Hill Education. All Rights Reserved. Terms of Use | Privacy Accessibilit ourse Syllabus....pdf FINAL PAPER W....pdf - Document26.pdf MacBook Air F10 F11 20 F3 F8 F9 00 F4 F5 F6 F7 F1…

One way to determine the hardness of a water sample is to precipitate the calcium out of solution as a carbonate.  The net ionic reaction for this precipitation is:                         Ca2+(aq)  +  CO32-(aq)  →  CaCO3 (s)   A 1.00 L sample of water is drawn from a Phoenix, AZ well and 0.534 g of calcium carbonate is recovered using the above reaction. What was the Ca2+ concentration of the original water sample in ppm? Show your work and include units.  Hint:  ppm stands for parts per million, and in the case of an aqueous solution, this is equivalent to mg/L.