Chemistry (repost)

Which of the following pairs of substances, when mixed in any proportion you wish, can be used to prepare a buffer solution?

1)NaCN and NaOH
2) HCl and NaOH
3) HCN and NaOH
4)HCl and NaCN
5) NaCN and HCN

is the answer 1 and 5??

chem - DrBob222, Sunday, April 10, 2011 at 1:28am
I don't believe 1 will do it.
Yes on 5. Also 3.
Buffers are weak acid and salt or weak base and salt.
HCN and NaOH can prepare the salt and have HCN left over.
NaCN is the salt HCN for the acid.

chem - Rachel, Sunday, April 10, 2011 at 2:18pm
I tried those and it was wrong

  1. 👍
  2. 👎
  3. 👁
  1. 5 can be made to a buffer. 3 can be made to a buffer. That means there must be another one since I assume you are keying this into a data base and you must have ALL of the problem right or it is counted wrong. I would look for another one if I were you. By the way, you KNOW 2 can't be one of them.

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. Math

    Which ratios form a proportion? a. 4/9, 12/25 b. 3/7, 18/42 c. 5/11, 20/45 d. 5/8, 15/25 Which ratio forms a proportion with 18/30? a. 20/35 b. 50/90 c. 36/48 d. 60/100 Which proportion has cross products of 5 x 24 and 8 x 15? a.

  2. Math

    1: select all the pairs of ratios form a proportion. (2 points) A: 1/6, 4/20 B: 7/9, 28/36*** C: 14/19, 21/27 D: 30/80, 6/18 2: Which pair of ratios does NOT form a proportion? (1 point) A: 3/5, 24/40 B: 30/10, 15/5**** C: 9/14,

  3. Science

    1. Which of the following is true about mixtures? (1 point) Mixtures consist of two or more substances chemically combined. Mixtures cannot be separated by physical means. Mixtures consist of only one kind of atom. ***Mixtures

  4. MATH CHECK ANSWERS

    CHECK THESE MATH ANSWERS PLEASE 1. There are 18 boys and 12 girls in a math class.what is the ratio of girls to total students? A.18:30 B.12:30(I PICK THIS) C.30:12 D.30:18 2.which of the following ratios are equivalent to 6:9?

  1. science

    Both carbon dioxide and water are pure substances. How are they similar to each other? A. both substances have a set ratio of atoms that cannot be separated by physical means. B. both substances have a set ratio of atoms that can

  2. MATH

    1. which ratios form a proportion a. 3/15 , 12/55 b. 8/24 , 12/35 c. 5/18 , 25/90 d. 4/11 , 16/25 4. solve the proportion using number sense: 2/8 = x/48 a. 6 b. 12 c. 16 d. 8 5. Solve the proportion using cross products. 18/20 =

  3. Math

    1. There are 18 boys and 12 girls in a math class.what is the ratio of girls to total students? A.18:30 B.(12:30) C.30:12 D.30:18 2.which of the following ratios are equivalent to 6:9? Choose all that apply. A.3:2 B.18/27

  4. Same substances?

    Question: Two substances, A and B, have the same melting point. how can you determine if they are the same without using any form of spectroscopy? Explain in detail. My answer: Perform a mixture melting point. In this procedure,

  1. art

    When creating a portrait, an artist wants to pay close attention to proportion as well as capture the personality of the individual A. alters proportion to create a special mood B. captures an outgoing personality out of

  2. science

    Both carbon dioxide and water are pure substances. How are they similar to each other? A. both substances have a set ratio of atoms that cannot be separated by physical means B. both substances have a set ratio of atoms that can

  3. Chemistry

    Any help would be greatly appreciated! Substances A, B, and C can all act as oxidizing agents. In solution, A is green, B is yellow, and C is red. In the reactions in which they participate, they are reduced to A-, B-, and C-

  4. Math

    Two shirts cost $12.50. How much will it cost to buy five of the shirts? Select all the pairs of ratios that form a proportion. Which are: 1/6,4/20 7/9,28/36 14/18,21/27 30/80,6/18. For which value of m is 4/16=m/24 a proportion?

You can view more similar questions or ask a new question.