# please explain titration problems. I'm a total noob at this and am trying to answer some prelab questions. Examples: 1. How many mL of a 0.800 M NaOH solution is needed to just neutralize 40 mL of a 0.600 M

114,051 results
1. ## Algebra

1.What is the simplified form of the following expression? 13[6^2€(5^2-4^2)+9] A.169 B.585*** C.181 D.26 2.What is the simplified form of the expression? 6xyz/2xz A.3 B.3y C.3xyz*** D.3x^2yz^2 3.In a football game. A running back ran for -7 and -5 on

2. ## chem TITRATION

1. If a student fails to remove a large air bubble in the buret before beginning the titration, what will be the effect on the volume of titrant required to reach the titration endpoint? A. The student will record a volume that is SMALLER than it should be

3. ## Math

Ivan finished 4/5 of his math homework problems and all 3 questions for his science homework before dinner . If he finished a total of 43 problems before dinner , what is the total number of math homework problems he was assigned?

4. ## Chemistry

Titration of an Unknown Acid... What effect on the molar mass of the unknown acid would each of the following have... Would it make the calculated molar mass high, low, or would it have no effect? 1. Adding 5 drops of phenolphthalein instead of 1 drop...

5. ## Calculus 2 (Differentiate & Decay Problem)

I have two problems I need help on, can someone show and explain step by step how to do the problems? For #1, how would you differentiate and solve the inital-value problem? For #2, I don't understand what I am doing wrong with the problem..I am sure it is

6. ## science

I am doing a titration lab and need help with a problem. (i used .100M H2SO4)(I used 10.0 ml of Ba(OH)2 solution and added 50.0 ml of distilled water making 60.0 ml total.) 1. Use the titration results to calculate the moles of H2SO4 that were used to

7. ## Mathematics

So this is some practice work i have and i was wondering if someone could help me so when i take the test i know how to write out and solve the word problems. Jason bought 6 movie tickets and 4 bags of popcorn. Michael bought 2 movie tickets and 3 bags of

8. ## Statiatics

A student ran out of time on a multiple choice exam and randomly guessed the answers for two problems. Each problem had 5 answer choices a, b, c, d, e and only one correct answer. What is the probability that she answered neither of the problems correctly?

9. ## Chemistry Titration Lab HELP!

Hi everyone! I just got a new lab that I MUST complete today, and it's about titration- I have absolutely no clue how to do it, it just doesn't make sense to me! I hope that someone can help explain to me how to do it so I can finish ASAP!! Thanks a lot,

10. ## American Government

Describe the problems that surfaced under the Articles of Confederation (8-10 problems we discussed in class) soon after the Revolutionary War. Use these problems and give a brief overview of Article I, II, III, IV, V, VI and the Bill of Rights of the U.S.

11. ## anaytical chemistry

experiment: potentiomeric titration 1. Why is continuos stirring (use of stirrer and magnetic stir bar)important in potentiometric titration? 2. Why should the increments of addition of titrant be narrowed down as the titration approaches the equivalence

12. ## AP CHEMISTRY

The following acid-base indicators are available to follow the titration. Which of them would be most appropriate for signaling the endpoint of the titration? EXPLAIN ------- COLOR CHANGE ------ INDICATOR Acid form Base Form pH Transition Interval

13. ## Chemistry

HC2H3O2 + NaOH --> NaC2H3O2 + H2O? a. when the titration is only half over, what species are present in the reaction flask b. what can be said about the pH at this point when the titration is half over? c. what is the pH at the equivalence point of this

14. ## Biotechnology

Consider the titration of 25.0 mL of 0.050 0 M Sn2+ with 0.100 M Fe3+ in 1 M HCl to give Fe2+ and Sn4+, using Pt and calomel electrodes. (a) Write a balanced titration reaction. (b) Write two half-reactions for the indicator electrode. (c) Write two Nernst

15. ## nutrition

What are some of the health problems associated with anorexia nervosa, bulimia nervosa, and binge-eating disorder? Explain, from a physiological standpoint, how eating disorders may lead to health problems. Give at least three examples to support your

16. ## Chemistry, pH, Buffers

Please help!! Given this data: mass of unknown acid 1.4671g Volume of NaOH used in titration 18.47mL Concentration of the NaOH used 0.2403M pH of the original acid solution 2.16 pH of the final acid solution 3.49 Show me how do I calculate the Ka of the

17. ## Chemistry

At the beginning of a titration to standardize the NaOH solution, Student A adjusted very carefully the initial burette volume to 0.00 mL, but he did not notice an important air bubble in the tip of the burette. At the end of the titration, the air bubble

18. ## ap chemistry

please explain titration problems. I'm a total noob at this and am trying to answer some prelab questions. Examples: 1. How many mL of a 0.800 M NaOH solution is needed to just neutralize 40 mL of a 0.600 M HCl solution? 2. You wish to determine the

19. ## Chemistry

During an acid-base titration, 25 mL of NaOH 0.2 M were required to neutralize 20 mL of HCl. Calculate the pH of the solution for each: a) Before titration b) After adding 24.9 mL of NaOH c) At equivalence pt d) After adding 25. 1 mL of NaOH e) The pH of

20. ## chemistry

Okay so i have this titration question and I don't really know the steps because everyone explains it differently. IF someone could explain me the steps of how i could solve this questions and other like this. Thanks In three runs of titration 22.8mL,

21. ## algebra homework help

A student missed 3 problems on a Physics test and received a grade of 94%. If all the problems were of equal value, how many problems were on the test? Round off your answer to the nearest integer. my answer is 5 questions

22. ## algebra homework help

A student missed 8 problems on a Chemistry test and received a grade of 47%. If all the problems were of equal value, how many problems were on the test? Round off your answer to the nearest integer. My answer is 15 question were on the test is this

23. ## Social Studies

PLEASE ANSWER! PLEASE ANSWER! PLEASE ANSWER! 1) Identify two problems resulting from urban sprawl in the western region of the United States. If these problems are not solved, what will the outcome likely be? 2) Why do you think the Canadian government is

24. ## Algebra

Here is the problem: A two-digit number is eight times the sum of its digits.When the number is added to the number obtained by reversing the digits,the sum is 99. Find the original number. Please explain hot to solve it and it would help a lot to if you

25. ## Algebra

Here is the problem: A two-digit number is eight times the sum of its digits.When the number is added to the number obtained by reversing the digits,the sum is 99. Find the original number. Please explain hot to solve it and it would help a lot to if you

26. ## Chemistry- titration

OK I REALLY NEED HELP!!! and i AM DESEPRATE!! I have a titration courswork tomorow and i need to know the measurment,procedual and significant errors that are made in titration and how they can be improved. Also i need help with the evaluation bit. I

27. ## calculus

the second number is the reciprocal of the fist and the sm is a minimum. this is my my work and i got stuck x=first number y=second number so y=1/x then what. i know the answer is 1 and 1. also can you explain why the answer is 1 and 1 and not just one. it

28. ## Chemistry

In my titration method it says trial titration. In my table it says rough titration. I know the meaning of both. But, are they the same thing and could i say my first titration rough value is both the trial titration and rough titration?

29. ## Physics - Satellites

Why must the centre of the satellite orbit coincide with the centre of the Earth? I'm such a science noob, please help >_

30. ## algebra

A student missed 11 problems on a Chemistry test and received a grade of 65%. If all the problems were of equal value, how many problems were on the test? Round off your answer to the nearest integer. X= # of problems 11= 3 of missed problems 65% of

31. ## Algebra

Can someone check my algebra answers and help me with the problems I don't understand? 1. n^2-n-20/2n^2 times n^2+5n/n^2-25 answer: n+4/2n 2. (2x-6/21)/(5x-15/12) answer: 8/35 3. 5x-3/6 - x+3/6 answer: 2x/3-1 4. 5x/26 - 2x/13 answer: 1x/26 5. 3x^2/9x^5

32. ## math

So I've been having trouble solving some problems. Mainly problems that look like this 5-(t+3)=-1+2(t-3) what causes problems is the 5- part. I asked my teacher for help, and he gave me a hint, which is to distribute a -1 like 5+(-1)(t)+(-1)(3) But I still

33. ## chemistry

Explain why sodium carbonate against hydrochloric acid titration using phenophthalein titration do not go to completion but stop at the sodium hydrogen carbonate stage.

34. ## Chemistry

If performing a potentiometric halide titration with Ag+: 1. Is siver nitrate a primary standard? Explain. 2. What is the purpose of using a bisulfate buffer? 3. Have 1.0000 grams of unknown, containing .3000g KCl and .7000g KI. You dissolve in 100 mL of

35. ## chem12

Hey guys i only have this question left on my review and i just can't fingure it out! Sketch a pH curve for the titration of 40.00mL of 0.100 M hydrazine, H2NNH2, having a K of 3.0x10^-6 by 0.100 M HCIO4 a) what combination of acide-base titration is this?

36. ## Chemistry 12

Hey guys i only have this question left on my review and i just can't fingure it out! Sketch a pH curve for the titration of 40.00mL of 0.100 M hydrazine, H2NNH2, having a K of 3.0x10^-6 by 0.100 M HCIO4 a) what combination of acide-base titration is this?

37. ## chemistry

) At the equivalence point in the titration of a strong acid with a strong base, do you expect the pH to be acidic, basic, neutral? Explain your answer. If the titration involves a strong acid with a strong base, the pH = 7 at the equivalence point. The pH

38. ## nutrition

What are some of the health problems associated with anorexia nervosa, bulimia nervosa, and binge-eating disorder? Explain, from a physiological standpoint, how eating disorders may lead to health problems. Give at least three examples to support your

39. ## CHEMISTRY

What should be observed during titration? My answer: We observe the change in color and change in turbidity of the sol'n. Am I right? Please add more things to be observed during titration. THANK YOU!

40. ## Chemistry, Buffers, pH

Hi could someone please help me in the next 5 minutes with this question: Given this data: mass of unknown acid 1.4671g Volume of NaOH used in titration 18.47mL Concentration of the NaOH used 0.2403M pH of the original acid solution 2.16 pH of the final

41. ## math

Mike completed 19 math problems before dinner for tonight’s homework, and he completed x problems after dinner. Write an expression to determine the total number of problems he completed.

42. ## Math

How many total squares are there on a standard 8 by 8 checkerboard? (It is more than 64)! Make sure to show all your work and explain your reasoning. Explain how you can determine the number of total squares for any N by N board. Bonus: How many total

43. ## Chemistry

You will titrate your weak acid unknowns with a solution of NaOH of about 0.10 mol/L. The lowest molecular weight on the list of unknowns is formic acid, MW = 46.03 g/mol. Your titration volume should be between 10 mL and 50 mL. What are the smallest

44. ## Chemistry

You will titrate your weak acid unknowns with a solution of NaOH of about 0.10 mol/L. The lowest molecular weight on the list of unknowns is formic acid, MW = 46.03 g/mol. Your titration volume should be between 10 mL and 50 mL. What are the smallest

45. ## math

A student missed 71 problems on a biology test and received a grade of 22%. If all the problems were of equal value, how many problems were on the test? Follow the problem-solving process and round your answer to the nearest integer.

46. ## meaning of a word

The constitution was an attemt to addrss the problems that existed under the Articles of Confederation. A) list and explain three problems of decentralized power under the articles of confederation. for each problem identify and explain one solution that

A student got 80 percent problems correctly which is 32 problems correct. how many problems are they in total? I got 40 in a page but it did not explain can you PLEASE EXPLAIN!!!!

48. ## Chemistry

How would you start these problems? ...I suppose this is a continuation from this post: (replace the numbers with id=1395127807) But, I have yet figured out the ΔH ̊ and ΔS ̊ . But once that is figured out, how would I start problem #1? Also, for

49. ## Chemistry

I don't know how to reply to an answer. First of all thank you! For the question I just asked about the titration curves. Would that mean that titrating with barium hydroxide would take half the volume that is used when titrating with sodium hydroxide? Oh

52. ## chemistry

briefly explain why excess HCl and NaOH solutions must be collected for treatment before disposal, but the titration solution from a completed titration can be safely poured into the drain, diluting with a large amount of water.

53. ## algebra homework help

student missed 11 problems on a Chemistry test and received a grade of 65%. If all the problems were of equal value, how many problems were on the test? Round off your answer to the nearest integer. X= # of problems 11= # of missed problems 65% of correct

I will appreciate it if anyone can help me with the following: 1. The optimal height h of the letters of a message printed on pavement is given by the formula . Here, h= (0.00252d^(9/4))/e d is the distance of the driver from the letters and e is the

55. ## Chem 2

Checking to see if I did this right? Titration of HN03 titrated with NaOH ending result is 1.38. Titration A, endpoint pH = 8 is pKa or pKb= 1.38x106=5.861 and Titration of NH03 titrated with KOH ending results 1.54. Titration B, endpoint pH = 7 is KaorKb=

56. ## chemistry

Hello. In the class, we did the experiment to calculate the value of Kc for the following reaction: CH3COOH+CH3CH2OH ÌCH3COOCH2CH3+H2O we measured the mass for 5 cm^3 of all 5 compound above: CH3COOH 5.236 g CH3CH2OH 4.021 g CH3COOCH2CH3 5.020 g H2O

yes ,i definetly did,more than once ,i just had trouble comprehending the way they try to explain it.thats why i asked to please get help showing several of both kinds of problems,some addition &some subtraction so i could try to understand how they where

58. ## nutrition

What are some of the health problems associated with undernutrition? Explain the cycle of malnutrition. Who does it impact? Explain your answer.

59. ## math

matthew got 36 problems right out of a total of 40 problems on a test. What percent of the problems did he get right?

60. ## Algebra 2

Before I go on and give you the problenms let me explain. i am not some lazy kid trin to get people to do my homework over the internet. I am freshman that just recently skippeda garde in math and I need some help. The problems below are from my pop quiz

61. ## Algebra 2

Before I go on and give you the problenms let me explain. i am not some lazy kid trin to get people to do my homework over the internet. I am freshman that just recently skippeda garde in math and I need some help. The problems below are from my pop quiz

62. ## AP CHEMISTRY

The following acid-base indicators are available to follow the titration. Which of them would be most appropriate for signaling the endpoint of the titration? EXPLAIN ------- COLOR CHANGE ------ INDICATOR Acid form Base Form pH Transition Interval

63. ## Pre-Calculus

I need help on these problems they are from my study guide and i don't have a clue on how to do these 3 problems and if anyone can show the steps and somewhat explain the steps so i can do it myself next time. 1.) sin25‹cos35‹sin‹35 The answer

64. ## chemistry.

in the titration between Na2CO3 and HCl... 1) at the first end point what reaction is stoiciometrically complete? 2)At the start of titration where HCl=0 is the solution acidic or basic. ExPlain? 3) At the 2nd end point what reaction is stiociometrically

65. ## algebra

I have a few math questions I made them just like my actual problems so that I can go through the steps you have went through to answer my own problems...Again THESE ARE NOT THE REAL PROBLEMS JUST EXAMPLES LIKE MINE WITH DIFFERENT NUMBERS. I don't know how

66. ## analytical chemistry

When a monoprotic weak acid is titrated with a strong base, the titration curve contains these many inflection points: a.zero b.one c.two d.three Can you also explain why you choose your answer to this question...thanks

67. ## chemistry

When a monoprotic weak acid is titrated with a strong base, the titration curve contains these many inflection points: a.zero b.one c.two d.three Can you also explain why you choose your answer to this question...thanks

When a monoprotic weak acid is titrated with a strong base, the titration curve contains these many inflection points: a.zero b.one c.two d.three Can you also explain why you choose your answer to this question...thanks

69. ## Chemistry

Consider the titration of 25.0mL of 0.10M HAc with 0.10M NaOH. That is, NaOH is added to HAc. (a)pH at the beginning of titration. (b)pH at the equivalence point of the titration. (c) pH at the midpoint of the titration.

70. ## Math

Can you please explain step by step on how to do each of these two problems below? And then tell me whether it involves an arithmetic sequence or a geometric sequence I also need the work shown out on both problems thank you. Perform the indicated

71. ## Social Studies

I really don't know......I've read my textbook over and over again but still don't know the answer........if someone could just give me a trusted website that i can read from or your answer in your own words. The question is down below!! Thank you The

72. ## math

Ivan finished es025-1.jpg of his math homework problems and all 3 questions for his science homework before dinner. If he finished a total of 43 problems before dinner, what is the total number of math homework problems he was assigned?

73. ## chemistry

Consider the titration of 20.00 ML of KOH 0.01 mol/L with HNO3 0.01 mol/L. Calculate the PH of the titration solution after the addition of the following titration volumes: A. 0.00 ml C. 20.00 ml B. 19.99 ml D. 25.00 ml

74. ## chemistry

a titration is done with with 25.00 mL of a .1500 M HBrO solution is titrated with .1025 M NaOH. Ka for HBrO= 2.0 x10^-9. The pH of HBrO before the titration begins is approx. closest to which of the following a. 0.82 b. 4.76 c. 8.70 d 10.60 e. 13.01 the

75. ## Math

Matthew got 36 problems rights out of a total of 40 problems on a tes.wht percent of the problems did he her rights

76. ## chemistry

hi im having problems figuring this out. consider the titration of 100 ml of 0.200 acetic acid by 0.100 koh. Calculate the ph if 250 ml of koh is added ? I tried to find the limiting reagent and go from there but it was a no go then i used the kb for find

77. ## chemistry - titration

Show that for the titration of a weak acid, HA, with NaOH solution, at half-titer, pH = pKa. Please explain your answer. Thank you. HA + NaOH ==> NaA + HOH Ka for HA = (H^+)(A^-)/(HA) and solve for H^+. (H^+) = Ka*[(HA)/(A^-) When HA is half neutralized,

79. ## Need to learn how to . . .

I need to learn how to do the following problems. Don't give me the answer but give me the steps leading to the answer then I will respond back with the answer. say if you had a problem that said: tickets to a game were sold for \$2 for each adult and 0.75

80. ## Chemistry

Help needed for writing up a balance chemical equation for an acid/base titration: for an extended experimental experiment we tested the total acid content of orange juice, then had to write the balanced chemical equation for the experiment to do further

81. ## chemistry

11.During an acid-base titration, 25 mL of NaOH 0.2 M were required to neutralize 20 mL of HCl. Calculate the pH of the solution for each of the following: 12.Before the titration. 13.After adding 24.9 mL of NaOH. 14.At the equivalence point. 15.After

82. ## social studies

i am studying about palestinia and israel i have to write 8 bullets notes on what are the problems of the palestians and israel in the middle east. I don't understand the problems going on over there is there a website for my age 12 to understand this

83. ## algebra

What is the difference between an equation and an expression? Include an example of each. Can you solve for a variable in an expression? Explain your answer. Can you solve for a variable in an equation? Explain your answer. Write a mathematical phrase or

84. ## Accounting/Financing

I am so weak at this new class I started no matter how many times I read my textbook, I cannot understand how to calculate ratios can someone please show me or guide me how to work these problems, I would really appreciate it, thank you please help me..

85. ## Jill

State the relationship of A to B (i.e. , = or can't be determined). 1. Using a 0.05 M Ag+ titrant A.VEP in titration 25-mL of 0.01 M MgCl2 B.VEP in titrating 25-mL of 0.01 M AlCl3 2. A 25.0-mL solution contains 0.015 M NaCl and 0.010 M HCl A.VEP (Mohr)

86. ## science-chem- theory questions

please, help me.. i think i know the answers, but i just want to make sure! i'd love your feed back :) 1) an air bubble is trapped in the tip of a buret before a titration. during the titration, the bubble is passed from the buret tip. will the reported

87. ## Chemistry

Explain why methyl red would be a good indicator for a titration of 0.25M NaOH with .025M HNO3, but a poor choice for use in a titration of 0.25M NaOH with 0.25M HCN. I'm pretty sure the first step is to find the pH of the two titrations (and then compare

88. ## precalculus

My book tells me to solve each exponential equation. I am given a lot of problems such as 6^x+1 = 4^2x-1 where I use In in the problem to help get my answer. However, in the same section, the book starts giving me problems such as 3(2)^x-2 +1=100 and

89. ## Chemistry

If two titrations were completed were completed: 1) the titration of HCl with Na(OH) 2)the titration of HCl with Ba(OH)2 (the concentrations of acid and base for both titrations are the same) How would the titration curves of each solution be different? I

90. ## math

a computer can preform 10^5 problems in one second. How many problems can in it do in 10 seconds I just need help solving this and having someone explain it to me

91. ## Chemistry

How would each of the folowing affect the accuracy of the calculated neutralizing power of the antacid (too high, too low, no effect)? Explain why. a) Titration flask was wet with distilled water b) The burette was initally not rinsed with 0.10M NaOH and

92. ## HRM215

How did the problems at Deloitte & Touche occur in the first place? Did their changes fix the underlying problems? Explain. What other advice would you give their managers?

93. ## algebra 1

please explain to me how I work out problems such as "-2-3" to get the correct answer and show the same on a number line

94. ## algebra

i am having problems with this current equation. 10/(5+x)= 12 so far i have tried to multiply both sides by x+5 but then my answer is x = 4.16... and im thinking its wrong. Thanks in advance and if possible answer with a explaination would be greatly

95. ## Chemistry

Pure ethanoic acid (25.0cm3, CH3COOH), pure ethanol (35.0 cm3, C2H5OH) and pure water (20.0cm3, H2O) were mixed in a sealed flask at room temperature. The flask was placed in a heated water bath and maintained at 323K until equilibrium was established.

96. ## Algebra

How can algebra be used to solve this problem? The boy solved 10 problems correctly at 8 cents a problem for a total of 80 cents, and 16 incorrectly at the cost of 5 cents for a total of 80 cents. Therefore, neither the boy nor his father owed each other

97. ## chemistry

could someone explain the fundamentals of titration please

98. ## Chemistry Lab

Last week, I did titration of Zn with EDTA experiment. I used calmigte as the indictor. The endpoint of this titration is supposed to be blue. The color change go from wine-red to violet to Blue. I did a mistake by stopping the titration at the violet

99. ## Chemistry Lab

Last week, I did titration of Zn with EDTA experiment. I used calmigte as the indictor. The endpoint of this titration is supposed to be blue. The color change go from wine-red to violet to Blue. I did a mistake by stopping the titration at the violet

100. ## chemistry

Hi. We did an experiment on Quantitatve Determintion of Total Hardness in Drinking water by Complexometric EDTA Titration and I have a lot of questions. 1. What is the concept of complexometric titration and water hardness? (Why is it expressed in ppm