Which of the following accurately describes the major species in solution at point C on the titration curve for the titration of NH3 with HCl?
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- Phenolphthalein is a commonly used indicator that is colorless in the acidic form (pH 8.3) and pink in the base form (pH 10.0). It is a weak acid with a pKa of 8.7. What fraction is in the acid form when the acid color is apparent? What fraction is in the base form when the base color is apparent?Q1) A sada- Lime Sample is 90% NaoH and 10% CaO• If 3gm is dissolved in 250 ml, what is the tutal normadity of the Selution as abase ? How many milliliters of O.57N H2 S@4 would be requiredd to titrate i00 me of the Solution ? Ans.s ( 0.309 N, 60.59 ml) Q12) How much water that required add to 200 ml HNO, ( densly = 1.285 gm/ml) Contains 46 wt% acid to Convert lo wt% acid solution? Ars. : 919.6 mlQ7) what is the pH at the equi vatent point in the titration of 5 mmol Potassium acid ph thalate dissofved in 100 md of water and itrat ed with 0.1M NaoH 9 k,= 4 tro6
- Icolculeute the pH qud plot the resulting titraton curve for Hhe titratton of 20ml, o.1l M ammonia by the additton of Coisill, is,20122, 25, 30, 35,40) ml of ot M Hcl ? Given that Kb= 1.79 10°UEid- base tit ration the Consentrat ion of ammonia Solution excess HCL was titrated ith o.07om Na, cO3 Solutian. The volume of Na, Coz Solution reguired was 15.50 ml using the following eguations: 2HCLem> + Na, COgcaps CO2 Cays + HzO1) t NaCL Calculate the concentration (molarity and ppm) of ammonia in the Original Solution.(MM of NHzis 17.031.9/4) 10.0 was by of o.10OMI HCE to Then101 Chem101 b My Questions | bartleby А аpp.101edu.co E Apps e Resource Library -. Dashboard 101 Chem101 E Reading list Word wco Writing Centers at. 11-0218 NCI Theor.. Question 5 of 11 Submit A solution of tartaric acid (H:C&H.Os) with a known concentration of 0.155 M H2C«H«Os is titrated with a 0.425 M NaOH solution. How many mL of NaOH are required to reach the second equivalence point with a starting volume of 70.0 mL H.C«H«Os , according to the following balanced chemical equation: H:CH.Os + 2 NAOH - Na:CaH.Os + 2 H:O STARTING AMOUNT ADD FACTOR ANSWER RESET *( ) 1000 0.425 0.001 0.0217 12.8 25.5 0.155 1 0.0511 51.1 5.11 x 104 70.0 g NaOH L H2CsH.Os mol H:CAH.O6 M H2CH«Os mol NaOH mL NaOH M NaOH mL H2CaH«Os L NAOH g H2C4H.O6 1:35 PM P Type here to search 46°F 2/27/2022
- Carlee titrates 50.0 mL of 2.0 M methylamine with 1.0 M HNO3. CH3NH₂ Kb = 4.4 x 10-4 What is the pH for the solution at the half- equvialence point? pH = [?] pH @ Half-Equiv Pt Enter100 ml g 0:4 Nof H sq mixed aiith Final Normaliliy og Result toletian is 100m) op 02 N NEOH, Then A) 0.1 B) 0-2 c) 0 3 D) 0.4ng resourc.. (27) Could've Been - [References] Calculate the pH at the halfway point and at the equivalence point for each of the following titrations. a. 100.0 mL of 0.30 M HC7H502 (Ka = 6.4 x 10-5) titrated by 0.10 M NaOH pH at the halfway point = pH at the equivalence point = b. 100.0 mL of 0.40 M C2H;NH2 (K½ = 5.6 × 10¬4) titrated by 0.10 M HNO3 pH at the halfway point = pH at the equivalence point = c. 100.0 mL of 0.70 M HC1 titrated by 0.15 M NaOH pH at the halfway point = pH at the equivalence point =
- The Merck Index indicates that 10 mg of guanidine,CH5N3, may be administered for each kilogram of bodymass in the treatment of myasthenia gravis. The nitrogenin a 4-tablet sample that had a total mass of 7.50 g wasconverted to ammonia by a Kjeldahl digestion, followedby distillation into 100.0 mL of 0.1750 M HCl. Theanalysis was completed by titrating the excess acid with11.37 mL of 0.1080 M NaOH. How many of thesetablets represent a proper dose for a patient who weighs(a) 100 lb, (b) 150 lb, and (c) 275 lb?5. A 300.0 mg sample containing Na,CO3, NaHCO3 and NaOH and inert material either alone or in some combination was dissolved and titrated with 0.1000 M HCI the titration required 24.41 mL to reach the phenolphthalein endpoint. And an additional 8.67 mL to reach the methyl red endpoint. Determine the composition of the sample and calculate the percent of each titrated component.A student needs to prepare a buffer made from CH3COOH and CH3COOK with pH 5.074. If K₂ for CH3COOH is [CH, COOH] [CH₂COOT] is required? C 1.80 x 10-5, what ratio of [CH3COOH] [CH, COO Submit Answer $ 000 R F V = % 5 [Review Topics] [References] Use the References to access important values if needed for this question. Retry Entire Group 9 more group attempts remaining T G Cengage Learning | Cengage Technical Support FS ^ 6 B MacBook Air ---F6 Y H & 7 N ◄◄ F7 U J * 00 8 ►ll M - ( 9 K F9 O Save and Exit dele