# CHEMISTRY> HELP QUICK! pls

i have an exam friday and cant figure this question out!
What is the pH of a 2.62 x 10 -1 M HCN solution ? NB the pKa for HCN = 9.212.

4.90
9.21
0.58
11.32
13.42

1. 👍 0
2. 👎 0
3. 👁 109
asked by Lucinda
1. See above.

1. 👍 0
2. 👎 0
posted by DrBob222

## Similar Questions

1. ### *****Help Statistic

Imagine taking a 10-question true or false exam. You randomly guess at each question. Don't do any calculations, just tell me your first impressions a). Is this a binomial setting? b) How many question do you think you would get

asked by Helen on March 26, 2014
2. ### Math

Ok so the question asks Below, draw Figure 0 and Figure 4 for the pattern below. Then describe Figure 100 in detail. So figure 1 a box with 2×2 with a tail of 2 boxes Then figure 2 Box 3×3 with a tail 4boxes Figure 3 Box 4×4

asked by Stacy on October 1, 2018
3. ### Statistics

Multiple choice question that's hard to figure out and understand.(information provided) Ten members of a fraternity take a statistics course. Here are their scores on the first exam in the course: 61,74,47,60,62,63,65,79,55,85.

asked by Junior on December 10, 2013
4. ### English

Can you please check these sentences for me? Many thanks. 1) At the moment I don't know at what time I will be arriving in Berlin on Friday 13 August. 2)I believe I will be able to have conversation classes with you from Monday to

asked by Franco on July 26, 2010
5. ### Probability (Pre-Calculus)

A class is given a list of eight study problems from which five will be part of an upcoming exam. If a given student knows how to solve six of these problems, find the probability that the student will be able to answer: (a) all

asked by Hailey on March 25, 2010
6. ### Calculus Exam

My calculus exam is on friday. I was wondering if anyone had any tips on doing well? I have severe test anxiety and it seems as though no matter how much I prepare I still do poorly. Does anyone have any suggestions for overcoming

asked by Hannah on December 7, 2008
7. ### CALCULUS EXAM REVIEW

Hi, my exam is tomorrow and I'm here with my girlfriend who's also in the same class trying to figure out how to do the exam review but we're stuck.. please be kind and help us out, we'd really appreciate it. Thank you in advance.

asked by Roberto & Cecilia on June 21, 2012
8. ### physics

Spaceship I, which contains students taking a physics exam, approaches Earth with a speed of 0.640 c, while spaceship II, which contains instructors proctoring the exam, moves away from Earth at 0.280 c, as in Figure P26.27. If

asked by Andy on April 16, 2010
9. ### physics

Spaceship I, which contains students taking a physics exam, approaches Earth with a speed of 0.640 c, while spaceship II, which contains instructors proctoring the exam, moves away from Earth at 0.280 c, as in Figure P26.27. If

asked by Andy on April 16, 2010
10. ### English

Select the clause from the drop-down menu to correctly punctuate this sentence. Of all the sitters we called, only the one ? ? agree to babysit. ,who was not busy on Friday (is it this one) who was not busy on Friday ,who was not

asked by Mary on February 24, 2019

More Similar Questions