How would the following error affect this lab? When completing the titration a dark pink endpoint was obtained. O The dark pink endpoint means the endpoint was overshot. Since more NaOH was used, the neutralizing capacity of the antacid will be calculated as higher. The endpoint should be pink. There is no affect on calculations here. O The dark pink color indicates the endpoint is overshot. Since more NaOH was used, it will look li the mol of acid were higher. This will result in a weaker antacid (neutralizing capacity) being calculated. As long as both endpoints are the same color, no error will be calculated.

A 30.0-mL sample of 0.20 M HCOOH was titrated with 0.20 M NaOH. The following data were collected during the titration. mL NaOH added pH B. C. D. 5.00 E. 3.07 What is the Ka for HCOOH? A. 1.1 x 10-7 1.7 x 10-4 1.2 x 10-8 4.9 x 10-11 None of these choices is correct. 10.00 3.47 15.00 3.77 20.00 4.07 25.00 4.77

Calculate the pH during the titration of 10.00 mL of 0.400 M hypochlorous acid with 0.500 M NaOH. First what is the initial pH (before any NaOH is added)?The Ka for HOCl is 3.0 x 10-8 M. (the answer is 3.96)   Please I really need these questions below answered they have to do with the above question. What is the pH after 6.40 mL of NaOH are added? What is the pH at the equivalence point? What is the pH after 11.00 mL of NaOH are added? What is the pH after 14.10 mL of NaOH are added? What is the pH when half the acid has been neutralized?

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Question 3 Choose the best indicator to use in the titration of a weak base (CH3NH2) methylamine with HCl. Indicator Titration Range Color Change Methyl Orange 3.1 - 4.4 red to orange Oa. Indicator Titration Range Color Change Ob. Methyl red 4.2 -6.3 red to yellow Indicator Titration Range Color Change Oc. Bromothymol blue 6.2 – 7.6 yellow to blue Indicator Titration Range Color Change Od. Thymol blue 8.0 - 9.6 yellow to blue Indicator Titration Range Color Change Oe. Alizarin yellow 10.0 12.0 Colorless to yellow A Moving to the next question prevents changes to this answer. NOV 21 427

Recall what you know about the neutralization of weak and strong acids and bases. Is the pH at the end point of this titration likely to be less than, approximately, or greater than 7?

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What is the mmole of NaOH?

1. How to pick the best indicator for any titration? a. The one that is pink, if the solution is acidic b. The one that is blue if the solution is basic c. The one with pKa of the solution = pH (predicted at the equivalence point) d. It's a trial and error procedure e. None of the above