Citric acid (abbreviated H3Cit) is a triprotic acid, so 3 moles of hydroxide ions are required per mole of citric acid for complete neutralization. A.) Write the balanced chemical equation for the reaction of citric acid with sodium hydroxide. (Note that citrate ion is actually a polyatomic ion with carbon, hydrogen, and oxygen atoms and an overall charge of −3. For now, express citrate ion as Cit3−.) B.) If 36.10 mL of 0.223 M NaOH is used to neutralize a 0.515 g sample of citric acid, what is the molar mass (in g/mol) of the acid?

1. Give reasons why the helium atom is smaller than the cesium atom. 2. A student got a problem wrong.  They were asked, “How many grams of MgCl2 (molar mass = 95.21 g/mol) are needed to make 3.16 L of a 0.500 M MgCl2 solution?”  The correct answer is 150. but the student got 1.58.  What mistake did the student make? 3. To solve the following problem what is the reason you must subtract the vapor pressure of water, 24 torr, from the total pressure, 747 torr in order to solve the problem? “A 500.0-mL sample of H2 gas is collected over water at 298 K and 747 torr.  What volume would the dry H2 gas occupy at STP?  (Given: the vapor pressure of water at 298K is 24 torr).” By the way, the answer is .436 liters. NOTE:  I am not asking you to solve this problem.  I am asking the reason for subtracting the vapor pressure.  If you simply solve the problem, you will get no points.

Which of these compounds are oxoacids (also known as oxyacids)? HF O hydrochloric acid chloric acid HCN H,PO, O Ba(OH), nitrous acid

Write a balance equation for the dissociation of the following ionic compounds. BaSO4 NaCl KOH MgCl2

Three monoprotic acids are shown in the table below.  Complete the table with the appropriate information. Acid Formula Molecular Wt (g/mol) pKa Ka Aspirin C9H8O4 180.15 3.49   Ibuprofen C13H18O2     6.3 x 10-6‑ Ascorbic acid (vitamin C) C6H8O6   4.17

5)Show the complete ionic and net ionic forms of the equations. Rubidium flouride + copper(II)sulfate ->

When acids react with metals, which of the following products are normally formed?     water   salt   hydrogen gas   carbon dioxide   none of the above

Predicting the reactants of a neutralization reaction Predict the reactants of this chemical reaction. That is, fill in the left side of the chemical equation. Be sure the equation you submit is balanced. (You can edit both sides of the equation to balance it, if you need to.) Note: you are writing the molecular, and not the net ionic equation. [] + KCIO(aq) + H,O(1) X ロー Ś

1 A solution of 2.50 M formic acid is 0.915% ionized. What is the pH of this solution? Enter your answer, rounded to the correct number of significant figures, in the box. pH = X 2.54 A solution of HA, a weak acid (pKa = 8.112), has a pH = 5.770. [HA]eq = 3.12 x 10-4 M. What was the initial concentration of the weak acid solution? Enter your answer, rounded to the correct number of significant figures, into the box below. If your answer is a decimal, put a O before the decimal point. Do not use scientific notation. pH = 1 [weak acid] initially = X X 4.00 0.00404 An aqueous solution of 0.045 M HA (pKa = 11.11) is prepared. What is the pH of this solution? Enter your answer, rounded to the correct number of significant figures, in box below. If your answer is a decimal, put a 0 before the decimal point. Do not use scientific notation. M 1050301 the

Part A During a certain time period, 3.9 mvilion tons of SO, were released into the atmosphere and subsequentiy oxidized to S0, The acid rain produced when the SO, dissolves in water can damage marble statues: How many 600 pound marble statues could be damaged by the acid rain? (Assume that the statues are pure CaCOs and that a statue is damaged when 3.0% of its mass is dissolved.) Express your answer to two significant figures. CaCO,() + H,S0,(a) CaSO;(aq) + CO,(e) + H,00) 916 statues Submit Previous Aneners Beounat Anamer X Incorrect; Try Again; 4 attempta remaining * Part B How many ters of CO: gas at 15 "C and 762 mm Hg is produced as a byproduct? Express the volume in liters to two significant figures. v (CO.) = L Submit Previous Antwers BeovestAnewer