Titration 1.0 vs FlightPlan!

This is a unique and informative utility for students and professionals alike. Aqueous acid-base equilibria can be studied from multiple perspectives, leading to greater insight and understanding. This is a great way to learn how subtle differences in chemical structure can change chemical reactivity. Often only one form of a molecule participates in a reaction and the fraction of that form can change significantly with small changes in local pH. For most analytical chemistry problems, this app will get you further than you'd hoped, in less time than if you'd guessed! Did you ever need: * to know the pH of a buffer solution? * to know how to make a buffer with a specific pH? * to know the endpoint of a titration? * to know which indicator to use? * to know the titration error for a given indicator? * to know the midpoint of a titration? * to know the pH of a specific salt or acid solution? * to know the sensitivity of a solution to pH changes? * to know the effect of multiple equilibria on pH and composition? * to show someone the complex interactions among multiple equilibria? The answer could literally be in your back pocket! Even for tetra-protic acids such as EDTA. This is a tool for beginning students and professionals alike. It is a tool you will grow into, but not outgrow. Who would find this app useful: * beginning chemistry students * chemistry majors *Practicing professionals; chemist, biologists, chemical engineers, material scientists This app has 13 pre-programmed analyses and displays the results both graphically and numerically. The calculations are based on the full coupled equations, which are supplied in the help section. These preprogramed analysis serve as reminders and guides to interpretation of results and ultimately, are a teaching tool for how to get the most value from the app itself. Graphs include: * the equiligraph, which shows composition vs pH * the buffer capacity, which shows the sensitivity of a solution to pH changes * the titration curve More than 80 molecules are included. These can be used 'as is' or can be a starting point for exploring other molecules. in Explore mode, the number of acid groups and pKa can be modified at will. Types of molecules included: * inorganic acids and bases * representative organic functional groups * nucleotide bases * essential amino acids * acid-base indicators * selected food related molecules The equiligraph is a time tested way of solving complex equilibria problems of both pure solutions and mixtures of poly-protic acids and bases. These graphs are extremely useful for explaining complex interactions between chemical species ( see http:// www.tahosa.us/Equiligraph ). There really is no better way to understand acid-base equilibrium than to see how composition changes over a broad pH range. This tool provides that global perspective. A half an hour with this app could save you an afternoon in the library and could even save you 6 months in the laboratory. You probably have an epiphany or two every time you use this app! This app will help you avoid blind alleys and lost time in the laboratory. A free trial version includes several common molecules. Full app function is available for these molecules, except for the ability to change pKa or change the number of protons.

This app allows you to visually program a flight plan for the Tello Drone and then upload it to the drone for execution. You can also fly the drone manually with the app if you wish. Real time telemetry from the drone is displayed on the glass cockpit. Tello is a mini drone equipped with a HD camera that is manufactured by Ryze Robotics and includes a flight controller with DJI smarts. We access the Tello API by connecting to the airframe via a WiFi UDP port. Once a connection is in place, the drone is controlled using simple text commands. So before using the app, make sure that your Tello drone is on and the iPhone is connected to the Tello WiFi. You can check this by going to Settings -> WiFi. The first time that you use the app it will request your permission to use Location Services. This is required to allow the app to determine the SSID of the WiFi connection so we know when you are connected to the drone. The app doesn't use location services for anything else. The app has two modes of operation: manual and planning / auto pilot. The app status is shown in the top centre panel. This panel also indicates whether WiFi is connected or not. It may take a few seconds for a change in WiFi status to be displayed.  If you are connected to the Tello and in manual mode, then tapping the take off icon will cause the drone to auto take off and hover. Tapping land will auto land. Only tap emergency stop if necessary as it will immediately stop all four motors and the drone will fall out of the sky! Tapping the plan button toggles the app state between planning mode and manual mode. In planning mode a grid (representing the ground) and yellow arrow (representing the drone), will appear. The arrow direction indicates the front of the drone. In planning mode, you can enter the sequence of commands which will be transmitted to your drone for execution. Start with take off or you will receive a warning message. When you are finished with your flight plan tap land. The arrow will simulate the position of the drone but is not to scale. Tapping the upload icon will send your flight plan to the Tello and execute it. While the plan is being flown, the app will display the glass cockpit. Real time telemetry from the drone is displayed on the glass cockpit. This includes pitch, roll, yaw, velocity (x, y, z), temperature, time of flight (tof), height, battery percentage, motor on time, barometric pressure, and acceleration (x, y, z). A full description of how the app operates is provided at our website (reefwing.com.au). FlightPlan is a refined version of another that I described in an article called "Programming the Tello Drone using Swift." (https://medium.com/@reefwing/programming-the-tello-drone-using-swift-f9122fd4aeb8?). You can refer to this article to understand how the app operates and create your own version.