plzzz like it and give some
positive feedback ..thank you!
Assignment 5 Thermochemistry Heat and Temperature PRE-LABORATORY QUESTIONS Due at beginning of Laboratory 1. For the...
I need help with 3
aMI5ILL: THERMOCHEMİSTRY 13 Name Date Score Pre-laboratory Assignment THE SIGNIFICANT FOR FULL CREDIT, SHOW DETAILED CALCULATION SETUPS REMEMBER TO FOLLOW CONVENTION, AND TO SHOW MEASUREMENT UNITS FOR EACH QUANTITY 1. Give brief definitions for these terms a) enthalpy change b) standard molar enthalpy of formation (AHA c) specific heat d) heat capacity 2. Underline the correct choice: If'a reaction carried out in a calorimeter absorbs heat, the calorimeter and its contents will b) If the...
A solution of nitrous acid and potassium nitrite acts as a
buffer due to reactions that occur within the solution when a
strong acid or a strong base is added.
Write the net ionic equation for the reaction that occurs in
this buffer to react away any added HCl (aq).
Write the net ionic equation for the reaction that occurs in
this buffer to react away any added NaOH (aq).
3. A solution of nitrous acid and potassium nitrite acts...
NAME INSTRUCTOR DATE SECTION GROUP POST-LABORATORY QUESTIONS THERMOCHEMISTRY: ACID-BASE NEUTRALIZATION 1. Use Hess's Law and the class enthalpy values for the reactions of NaOH-HC and NH, HCl to calculate the enthalpy of neutralization of ammonium chloride and hydrochloric acid. You may need to reverse or multiply the chemical equations from Table 7.2 and 7.3 to get them to add up correctly: Experiment Chemical reaction (Refer to the reactions that you wrote in prelab question 3). Class enthalpy value (kJ/mol 7.2...
Pre-laboratory Assignment Name: Read the experiment and answer the following questions as directed by your instructor. 1. In this experiment, you will use potassium hydrogen phthalate (abbreviation KHP, formula HKCH.0) to standardize (to determine the concentration precisely of) the NaOH solution. What is the molar mass of KHP? 2. In Part 1, you will titrate a weighed mass of KHP (dissolved in water) with the unknown NaOH solution. What data must you collect in order to find [NaOH)? List the...
im not sure how to calculate the answers for the last three
boxes
Thermochemistry -Data Sheet Trial 1 Trial 2 Trial 3 Mass of calorimeter & reaction solution Mass of calorimeter 330.05 8 330.05 g 160.28 B 169.77 B 330.056 160.288 169.778 8 Mass of reaction solution 160.23 169.778 Trial 1 Trial 2 Trial 3 "C 35. °C °C Temp. of reaction solution after mixing Temp. of NaOH solution & calorimeter Temperature change (AT) due to reaction 35.1 22.6 12.5...
C. Net lonic Equations-A Study Assignment 1. Strong Acid and Strong Base: equation: HCl(aq) NaOH(aq) NaCl(aq)H20(0) total ionic: net ionic: 2. Strong Acid and Weak Base: equation: HCaq)NH OH(aqNHCI(aq) +H200) total ionic: net ionic: 3. Weak Acid and Strong Base: equation: HF(ag) + NaOH(a)NaF(aq)HO0) total ionic: net ionic: 4. Weak Acid and Weak Base: equation: HF(aq) +NH0H aqNHF(aq)H200) total ionic: net ionic:
Acid - Base Titration Experiment ACID-BASE TITRATION CHEM 1111 Name Date: Post - Laboratory Review Questions and Exercises DUE AFTER COMPLETING LAB. ANSWER IN THE SPACE PROVIDED 1. Write the Molecular, Complete, and Net equations for the neutralization reaction of HC and No. 2. How many milliliters of 0.50 M Phosphoric acid, H,PO.. are required to neutralize 25,0 mL of 0.50 M NaOH? 3. Why should you plan to start the titration with the acid and base burettes filled exactly...
please I need help with this questions
SNL 4) Classify each of the following as non-ionized, partially-ionized, or ionized. Write each compound as it exists in aqueous solution e.g. NaCl(aq) → Na' (aq) + Cl(aq) HCl(aq) - a strong acid Ca(OH)2 (aq) - a strong base HC,H,O, (aq) - a weak acid Ba(OH)2 (aq) - a weak base 5) For the chemical reaction H2SO, (aq) + 2 NaOH(aq) → Na2SO. (aq) + 2 H20 (1) Write the complete ionic equation:...
Acid-Base Titration PRE-LABORATORY ASSIGNMENT This assignment must be completed in your notebook prior to attending pre-lab lecture. 1. Sketch a picture of a 50 mL buret. Clearly label the location on the 0.00 mL line and the 50.00 mL line on the buret. Refer to appendix 5E for information about a buret. 2. Write the balanced chemical equation that will be used during this titration experiment. 3. Assume a student performed the acid-base titration experiment that you will be doing...
Pre-lab Questions Using information from the Sample Problem and Calculation from the introduction, determine the new pH of the solution after the addition of 2.0 mL of 0.10 M NaOH. Assume you are starting with the 50.0 mL of the 0.10 M acetic acid and 0.10 M acetate buffer solution 1. 2. In this lab, we will be looking at the ammonia/ammonium ion buffer system. Answer the following questions Write the balanced and net ionic equations for the reaction of...