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37 solutions

Solution Stoichiometry

Q. A sample of 7.75 g of Mg(OH)2 is added to 25.0 mL of 0.200 M HNO3. How many moles of Mg(OH)2, HNO3, and Mg(NO3)2 are present after the reaction is complete?

Solved • Aug 12, 2019

Solution Stoichiometry

Q. Gold is isolated from rocks by reaction with aqueous cyanide, CN-: 4Au (s) + 8NaCN (aq) + O2 (g) + H20 ---------> 4Na[Au(CN)2] (aq) + 4NaOH (aq). How many liters of a 0.200 M sodium cyanide solution would be needed to react with 40.0 kg of rocks that contain 2.00% by mass of gold?

Solved • Aug 12, 2019

Solution Stoichiometry

Q. What is the concentration of nitrate ions in a 0.225 M Sr(NO3)2 solution?

Solved • Jul 15, 2019

Solution Stoichiometry

Q. Sodium hydrogen carbonate (NaHCO3), also known as sodium bicarbonate or "baking soda", can be used to relive acid indigestion. Acid indigestion is the burning sensation you get in your stomach when it contains too much hydrochloric acid (HCl), which the stomach secretes to help digest food. Drinking a glass of water containing dissolved NaHCO3 neutralizes excess HCl through this reaction: HCl(aq) + NaHCO3(aq) -> NaCl(aq) + H2O(l) + CO2(g) The CO2 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 150 mL of a 0.023 M HCl solution. What mass of NaHCO3 would she need to ingest to neutralize this much HCl? Round your answer to 2 significant digits.

Solved • Jul 12, 2019

Solution Stoichiometry

Q. What volume of a 0.130 M NH4I solution is required to react with 623 mL of a 0.680 M Pb(NO3)2 solution?

Solved • Jul 11, 2019

Solution Stoichiometry

Q. What is the concentration (in M) of NaCI in a solution if titration of 15.00 mL of the solution with 0.2460 M AgNO3 requires 20.23 mL of the AgNO3 solution to reach the end point? t AgNO3(aq) + NaCI(aq) —> AgCl(s) + NaNO3(aq)

Solved • Jul 8, 2019

Solution Stoichiometry

Q. What volume (in mL) of 0.09156 M HNO3 is required to react completely with 0.2239 g of potassium hydrogen phosphate? 2 HNO3(aq) + K2HPO4(aq) -' H2PO4(aq) + 2 KNO3(aq)

Solved • Jul 8, 2019