In class questions: Q97: - Use the provided equation to calculate the following: KMNO, (aq) + HCI (aq) → MnCl, (aq) + Cl, (g) + H,O (1) + KCI (aq) a. The moles of H,0 that can be obtained from 15.0 mL of 0.250 M HCI. b. The volume of 0.150 M KMNO, needed to produce 0.0143 g MnCl,. c. The volume of 2.50 M HCl needed to produce 125 mL of 0.525 M KCI. 2KMNO, (aq) + 16HCI (aq) → 2MNCI, (aq) + 5Cl, (g) + 8H,0 (I) + 2KCI (aq) 01:36:12 01:59:28
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- 30jud to 28AM basu mw 5. Sodium carbonate is a reagent that may be used to standardize acids in the same way that you have used KHP in this experiment. In such a standardization it was found that a 0.498-g sample of sodium carbon- ate required 23.5 mL of a sulfuric acid solution to reach the end point for the reaction.2- Suppose a 0.025 M aqueous solution of phosphoric acid (H3PO4) is prepared. Calculate the equilibrium molarity of HPO properties of phosphoric acid in the ALEKS Data resource. Round your answer to 2 significant digits. M 0 X S ? You'll find information on theI want number 7 how to get to the targeted product thank u
- (ans: -7.50 x 10 ) one mole of sucrose). Imol %3D 9reaction=n AH %3D %3D (ans: -5.64 x 10 kJ/mol) Calcium chloride and sodium hydroxide react according to the equation: CaCl(aq) + 2 NaOH(aq) → Ca(OH),(s) +2 NaCl(aq) What volume of 2.00 M NaOH would be needed to react with 50.0 mL of 1.50 M CaCl,? a, 017 (ans: 75.0 mL) b) When 50.0 mL of 1.50 M CaCl, solution and 80.0 mL of 2.00 M NAOH solution (i.e., 5.0 mL more than calculated in part (a)) both initially at 22.3°C are mixed in a coffee-cup calorimeter with a calorimeter constant of 12.8 J/ C, the temperature fell to 20.0°C. If the density of the reaction mixture is 1.03 g/mL and its specific heat 3.94 J/g°C, calculate the heat absorbed hv the reaction. (ans: 1.24 x 103) c) Calculate AH (in kJ per mole of Ca(OH)2 formed) for the reaction. (ans: 1.6 x 10' kJ/mol)Complete the balanced neutralization equation for the reaction below. Be sure to include the proper phases for all species within the reaction. П + Reset 0₂ C 1 2 3 4 HC₂H₂O₂(aq) + Sr(OH)₂(aq) 2 3 2 3 ■ U 00 Question 52 of 70 ■ O LO 5 6 + ☐6 ²+ 3+ 2+ 7 8 9 07 ☐8 H 4+ U 0 (s) (1) (g) (aq) Sr 口。 • x H₂O Delete Submit +VIII. A primary standard of HCI is sodium carbonate, Na2CO3. A measured mass of solid Na2CO3, mNa2CO3' in grams, is dissolved in water and then titrated with HCI solution using methyl 2 NaCl + CO2 + H2O. orange indicator. The reaction is: Na2CO3 + 2 HCI- Complete the following formulas using the context described above: MHCI × VHCI in mL at the methyl orange endpoint = mNa2CO3 × ( )= mol of Na2CO3 mol of Na2CO3 X (— ( - - )= mol of HCl
- 89:24 PM Mon Feb 21 * 65% A openstax.org Solute concentrations are often described with qualitative terms such as dilute (of relatively low concentration) and concentrated (of relatively high concentration). Concentrations may be quantitatively assessed using a wide variety of measurement units, each convenient for particular applications. Molarity (M) is a useful concentration unit for many applications in chemistry. Molarity is defined as the number of moles of solute in exactly 1 liter (1 L) of the solution: mol solute M = L solution EXAMPLE 3.14 Calculating Molar Concentrations A 355-mL soft drink sample contains 0.133 mol of sucrose (table sugar). What is the molar concentration of sucrose in the beverage? Solution Since the molar amount of solute and the volume of solution are both given, the molarity can be calculated using the definition of molarity. Per this definition, the solution volume must be converted from mL to L: mol solute 0.133 mol M = = 0.375 M L solution 355 mL × 1L…1.3
- A cvg.cengagenow.com/ilrn/takeAssignment/takeCXPCompliantActivity.do?locator=Dassignment-take CHAPTER 4 - STOICHIOMETRY: QUANTITATIVE INFORMATION ABOUT CHEM OPrevious Page 5 of 9 Nex If you dilute 20.0 mL of 1.75 M hydrochloric acid to 700. mL, what is the molar concentration of the dilute acid? Molar concentration = nttps//als asp.cengage.info/als-asp/takeDescribe how to calculate the ocean concentration of CO3 2 - using the data collected from 2015. You do not need to calculate it, only mention what data, constants and equations are needed.3 Bal, (aq)+ 2 Nag POq Caq) 7 BalPO42 + l6 Nal laq • Consider the reaction of 30.0mL of 0.270M Balz with 20.0 mL of 0.3ISM Naz PO4. Lwhat quantity in meles of Balz are preset in the solution? are produced /What quantitg in moles of precipitate E ali Bal were consumed based on the balanced chomical equation? 6) What auantity in males of Na3 Pla aro present in soluction? d) What quantity in moles of precipitate are paduced if all the Naz PO, were cansumed based on the balanced chemi.cal equation? e) which reactant is limisting f What mass (in g) of precipitate is firemed when the limiting reactant is considered?