CHEM101L Lab Exam 7

Can someone pls help thx

The NaOH and the KHP react in a 1:1 RATIO.  Therefore, how many moles of NaOH were used to neutralize the acid in each trial?

Find the Final volume of buret (mL) and the Concentration of NaOH (M )

I need help finding the net ionic equation based off of the molecular equation in the previous question. Help to solve Part B.

The following volumes of 0.000300 M SCN- are diluted to 15.00 mL. Determine the concentration of SCN- in each sample after dilution. These values will be used during the experiment.  Sample 0.000300 M SCN- (mL) [SCN-] (M) 1  1.50   2 3.50   3 7.00   4 10.00

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Pre-Lab Questions 1. Explain the benefit of letting the solutions of HCl(aq) and NaOH(aq) sit overnight. 2. When using the same graduated cylinder to measure the volumes of HCl(aq) and NAOH(aq), it is important to rinse the cylinder with water and a small amount of the second reactant before measuring the volume of the second reactant. Explain why this is important for this investigation. 3. Describe how to perform each of the following safely: • diluting a strong acid solution with water • dissolving a solid base in water • adding a solution of base to a solution of acid 4. If acid comes in contact with your skin, why must you flush the area with plenty of cold water, rather than neutralizing the acid with a base?

Report sheet for Titration of vinegar   Part I:  Standardization of the NaOH solution with KHP                                                                                      Trial 1               Trial 2               Trial 3                          Mass of Erlenmeyer flask + KHP (g)                                   78.34               78.27               78.01 Mass of empty flask (g)                                                  77.12               77.12               77.12 Mass of KHP (g)                                                                1.22              1.15                 0.89    Final buret reading (mL)                                                31.35               30.53               27.71               Initial buret reading (mL)                                              16.35               15.78               14.20               Vol NaOH solution delivered (mL)…

Pls help ASAP ON ALL ASKED QUESTIONS PLS PLS

Volumetric Analysis Liza carefully pipets 25.0 mL of 0.525 M NaOH into a test tube. She places the test tube into a small beaker to keep it from spilling and then pipets 75.0 mL of 0.355 M HCl into another test tube. When Liza reaches to put this test tube of acid into the beaker along with test tube of base, she accidentally knocks the test tubes together hard enough to break them and their respective contents combine in the bottom of the beaker. Is the solution formed from the contents of the two test tubes acidic or basic? What is the pH of the resulting solution?

You dilute the river water 10 times for the analysis of SDS concentration. The instrument measures an average molar concentration of SDS in the diluted river water to be 1.689 10-4 mol/L. The molar mass of SDS is 288.4 g/mol. What is the mass concentration of SDS in the original river water? 4.87 10-1 g/L 4.87 102 g/L 5.86 106 g/L 5.86 10-5 g/L

Consider the titration of 25.00 mL of Sprite with 0.053 M NaOH. Using the following data, determine the citric acid concentration in Sprite (g/L). Take the molar mass of citric acid to be 192.124 g/mol. Give your answer to one decimal place. initial volume (mL) final volume (mL) Your Answer: Answer Buret reading (mL) 1.64 14.52

In a titration experiment, 27.7 mL of 0.719 M HCOOH neutralizes 29.2 mL of Ba(OH)₂. What is the concentration of the Ba(OH)₂ solution? Round your answer to 3 significant digits. M 0x X

using table 1, answer the questiosn below.  Mass of Crushed Antacid (g) .500g Concentration of HCl (M) 1.0 M Volume HCl (mL) 5.01ml Concentration of NaOH (M) 1.0M Initial NaOH Volume (mL) 4.10ml Final NaOH Volume (mL) 2.60ml Total Volume of NaOH Used (mL) 1.5ml   HCl available for neutralization (g): Moles of NaOH required to reach stoichiometric point (mol): HCl neutralized by antacid (g): HCl neutralized per gram of antacid (g):

attached is a lab. I have all the answers. Can someone just write a nice introduction for this lab for me!! thank you

ENB Assume the densities of all solutions are 1.0 g/ml and their specific heat capacities 4.184 J/g. Experime The enthalpy change of neutralization Part I 3 NH4OH(aq) + HCl(aq)- NH4CI(aq) + H2O(E) 2.1 Equation of reaction: 2.0 M HCI 2.0 M NH.OH Volume Number of moles 0.05 25 ml 25 ml 0.05 Temperature 15 °C 15 °C eaction Initial Temperature,T Final Temperature, T Change in temperature, AT 15 °C 16.5 °C 1.5 °C Calculation of q- in J (q- = - qsa) 2.2 What is the enthalpy change (AH) in kJ.mol, when 1 mol of acid is 2.3 neutralized?

I need help with this problem please. The unknown acid type is H3A

Hd 10 5 0 5 mL of NaOH added 10 20 15 10 LO 5 0