All of the following statements concerning buffers are true EXCEPT?
All of the following statements concerning buffers are true EXCEPT a.buffers contain appreciable quantities of a weak acid and its conjugate base. b.buffers are used as colored indicators in acid-base titrations. c.buffers are resistant pH changes upon addition of small quantities of strong acids or bases. d.buffers are resistant to changes in pH when diluted with water. e.the pH of a buffer is close to the pKa of the weak acid from which it is made.
Buffers do all of the following EXCEPT:?
Buffers do all of the following EXCEPT: A. Make a solution strongly acidic B.Maintain a stable pH within a solution. C. Absorb excess hydrogen ions when an acid is added to a solution. D.Help organisms maintain homeostasis. E. Donate (provide) hydrogen ions to the solution when an base is added to the solution.
When mixed together, all of the following pairs can form buffers except?
Answer: e (no weak acid or weak base)
A buffer solution is all of the following except...?
A buffer solution is all of the following except... a) a solution that resists a change in pH when a base is added b) a solution that resists a change in pH when an acid is added c) a solution that contains both a week acid and its conjugate base d) a solution that regulates pH by the addition of a strong acid or base
Each of the following mixtures can produce an effect buffer solution EXCEPT?
Each of the following mixtures can produce an effect buffer solution EXCEPT a.Na2HPO4 and Na3PO4. b.HF and NaF. c.HClO4 and NaClO4. d.NaHCO3 and Na2CO3. e.NH4Cl and NH3.
If 100 mL of each of the following solutions is mixed, which one produces a buffer?
NH3 and KOH are both bases so they do not form buffer. NH4Cl + KOH is a weak acid combined with a strong base but since they are both at one mole, the strong base will make the solution more basic. NH3 + HCl is a common weak base combined with a strong acid but since they are also both at one mole, the solution is more acidic. NH3 + HCl where NH3 is at 1 mole and HCl at 0.4 mole works since there are less strong acid and more weak base meaning it should balance out a bit. NH4Cl + HCl combines a weak acid with a strong acid. No buffer from this one. In conclusion, answer choice 4 should be your best bet.
Is there any tool like Buffer or Hootsuite, that will allow me to post or schedule posts in different Facebook groups (where I'm not the admin)?
As far as i know, there are a lot of social media marketing tools similar to Buffer/Hootsuite, and FL Facebook Ver is the best social scheduling tool that i used for marketing work, it is a revolutionary tool for Social Network Marketing!This tool a powerful program that be designed to run thousands of social network accounts(Facebook, Instagram, Google+, Linkedin and Pinterest etc.) at the same time 24/7 to auto follow, unfollow, follow back, like, unlike, post, invite, pin, comment, share, add friends and send messages etc.These are the main functions for each version:Facebook Version: auto follow, unfollow, add friends, unfriend, accept friends, like pages/posts, like/reply comments, share, comment, send message; auto post, post on wall/timeline/groups, create groups, join/leave groups, invite user on groups, invite user to like page, export users from groups/pages.Instagram Version: auto follow, unfollow, like, unlike, comment.Pinterest Version: auto like, unlike, follow, unfollow, save pin, repin, follow boards, unfollow boards, comment, send direct messages, invite user to board.Google+ Version: auto +1, post, comment, share, follow, unfollow people, follow collections, join communities.LinkedIn Version: auto like, share, comment update, share an update; auto like, share, comment posts; auto follow people, companies, universities; send invitation, send message to connections; like/reply comments, accept requests, endorse skills.Now we have added Youtube, Reddit, Tumblr, and we are adding more popular sites like twitter, snapchat and myspace etc. And soon, you can create a task to mix different sites' function to finish a complex task.It has been designed to be a very smart program. Every basic function(follow, unfollow, comment, like, search and get content etc.) has been designed and divided into basic module, you can combine, mix and sort these modules to generate any tasks you want.
What is the concept of buffering in an operating system?
Buffer : a buffer is a region of memory used to temporarily hold data while it is being moved from one place to another.That would be the most simple yet sensible definition for a buffer irrespective of where it may appear. Computers often have different devices in it that work at different speeds. For example the RAM is much faster when compared to the Hard Disk. Further the CPU of a computer is only capable of handling a specific amount of data in a given time.These and many other reasons make it a need for operating systems to have Buffers or Temporary memory locations it can use. For example imagine that there are two different processes. It can be tricky to transfer data between these processes as the processes may be at two different states at a given time.Let us say process A : Is sending a bitmap to the printer driver so that it can send it to the printer. Unfortunately the driver is busy printing another page at that time. So until the driver is ready the OS stores the data in a buffer.The same concept is applied for other things like copying files to a USB drive, playing a video, taking input from a IO device etc.
How do I stop the buffering of a YouTube video?
Most likely, one of the following things are at fault:Slow internetPoor Wi-Fi signalSlow wireless router/access pointSlow wireless adapter in client deviceIf you go to Speedtest.net (download the app if you’re on a phone) and do a basic speed test, you’ll get an idea if it’s one of those things. Unfortunately, it won’t tell you more than that, as all of these issues will affect the speed of the internet reaching your computer or other device, but it will confirm that it’s not a more exotic problem. If you’re seeing slow speeds (say, less than 10 Mbps), your buffering is probably due to one of these four reasons.To investigate signal strength, try moving to where you’re directly next to your router and re-test. If it’s faster, signal strength is probably a contributing factor. Mvoing the router, adjusting the antennas, or just getting a better, stronger one may resolve this issue more permanently.If you can connect via Ethernet, do that and re-test. If your speeds are better, it’s probably due to a cheap, slow wireless adapter in your device or in your wireless router. If it’s a reasonably high-end device (>$400) or router (>$50), it’s probably not the culprit. But you can look up the specs just to be sure. Nowadays, you really shouldn’t bother with anything less than dual-band wireless-N (may be listed as 802.11a/b/g/n or just 802.11n). If you’re running a single-band wireless-N access point or device, you should probably upgrade anyway, although a single-band client should fast enough. Get something with wireless-AC if you can. But if you’re already dual-band N or AC, you’re just fine.And if you’ve resolved all of the above, it’s probably just your connection speed. Basically, talk to your ISP and see if you can get a faster connection. Or if you’re in an area that supports it, check out Google Fiber.In my apartment, I can get 100 Mbps through Ethernet, and I literally never have to wait for YouTube to buffer. Yeah, I’m a bit spoiled. :D