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E https session masteringchemistry.com/ p c c please Explain Thank You! Ch... Mast Chemistry: Chapt x Ch assistance? I Yahoo GG lf you had a 0.350 L solution co ering hemistry File Edit View Favorites Tools Help bing mSn Q Bio test #4 flashcards Qui... Q Search chapter 8 test che... e chemistry is EASY How d... Q Chemistry Mid-Term Mul Q Chapter 1 Chemistry and Pag Safety Tools Chem 100 Fall 2015 Close Chapter 12 Homework t Core Chemistry Skill: Calculating the Quantity of a Reactant or Product for previous l 10 of 10 l return to assignment What volume o 1.25 in liters is needed to react completely (with nothing left ove with 0.500 of 0.500 MNa2CO? t Core Chemistry Skill: Calculating the Quantity of a Express your answer to three significant figures and include the appropriate units. Reactant or Product for a Chemical Reaction in Solution 0.400 L Hints My Answers Give Up Review Part The stoichiometric relationship between the reactants and products of an aqueous reaction can be used to determine different kinds of information about a reaction, such as the Correct volume of a given molarity reactant required to produce a certain amount of product. Part B A 565-mL sample of unknown HClsolution reacts completely with Na2CO3 to form 16.1 g CO2. What was the concentration of the HCl solution? Express your answer to three significant figures and include the appropriate units. Valle Units Subm Hints My Answers Give Up Review Part Continue Provide Feedback 100% 3:54 PM 11/14/2015Explanation / Answer
V = 565 ml or 0.565 L of HCl
Na2CO3
forms m = 16.1 g of CO2 or mol = mass/MW = 16.1/44 = 0.366 mol of CO2
find HCl
4 HCl + 2 Na2Co3 --> 4 NaCl + 3 Co2 + 2 H2
find moles of HCl
if ratio is 4 mol of HCl per 3 mol of CO2, then ratio is 4/3
therefore
0.366 *4/3 = 0.4879 mol of HCl reacted
M = mol/V = 0.4879 / 0.565 = 0.8635 M of HCl
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