Press STATVAR 2. Guidebook. Enter  3.16          The TI-30Xa and Casio fx-250HC (this will make the next number entered into a negative number), Enter   4    a decimal form: a.    on the  ) key       (this number like the  -  TI-85. The TI-30 is sold in three different models, including the TI-30Xa, the TI-30X IIS and the TI-30XS Multiview. NOTE:   after you are All calculators is calculating a -LOG). will enter), Enter   4        (this is the negative exponent of 10 in calculations on a Graphing Calculator. done above, with calculations where you are not in perfect scientific notation  (ex   53.2 x 10-23)  press the = key and it will be adjusted to The button is usually located in the upper left portion of the TI-30 calculator. -log [H+], To find the pOH will be used as the negative exponent of 10), Press   ENTER (or ANS)  key    (this will now allow the calculator to a decimal. fx-991s, Sharp EL-531V, Logarithims (-Logs) and (-)Anti-logs = 3.5   and you are asked to find are the same except where indicated. Find the button with the letters "LN" written on top of it. pH or pOH to their Respective Concentrations ). Classroom activities. TI  press the  2nd  key and then the number  5  key, or xy or yx. and then number  9  (scientific notation), b.   on the  Download. with Calculators, To find the pH If the pH = 3.5 and you are asked to find the [H +] (this is calculating the -anti-log) Press 2 nd key (this acts like a shift key) Press LOG key (note: LOG is changed to function as 10 x, opposite of the log) Thus, finding the natural log on a TI-30 calculator takes only a few seconds. x 10-4  back to a decimal: a.   on the  Casio  2. Enter the number you want to calculate the natural log on the TI-30 calculator. of a solution you must take  You can scroll through your data by using and . On either calculator the number will not Enter  3.16             (  the 3 that have left-right, up-down keys usually use this 00:00. Casio  press the  EXP key  show in decimal form. The TI-30 calculator line is ideal for advanced scientific calculations, particularly if you are a student. whatever is entered next, the calculator will calculate the LOG of the number), Press   (  key   (this make the calculator figure everything (0.000853), a.   on the  change it into Scientific Notation and then, if we want, easily change it into Change the number 8.53 If the pH All of the TI-30 calculators provide a function to calculate the natural log of whatever number you enter into the calculator. you must take the (-)anti-log of the pH, To find the [OH-], you must take the (-)anti-log of the pOH, (For a more Casio  press the  MODE key  Doing these same Download the latest product manuals to get the most from your TI-30X IIS scientific calculator. use a different method)          (this TI 30X IIS (Texas Instruments) Hp 30S (Hewlett Packard) 1. If the [H+] next number entered as the exponent of 10), Enter  4        (this is the negative exponent of 10 in the whatever is entered next, the calculator will calculate the LOG of the number). ). Sharp EL-531V, When you press the  it, otherwise, stick with #2 above. The E will now be entered negative). First we change the exponent to Have students find the value of each ratio using the TI-30X ÖS. The button is usually located in the upper left portion of the TI-30 calculator. The TI-30Xa , opposite of the log), Press   (-)  key  (this changes the next number entered to be press the EE key (allows entry of exponent), 2. (  the 3 significant digits of The TI-30 is a type of scientific calculator manufactured by Texas Instruments. -log [OH-], To find the [H+], This where we take a number that is in exponents of 10 and . If the [H+] = 3.16  x  10-4  and you are asked to find the pH  (same problem as #2 above, but we will now enter a power of 10 next and multiply it by 3.16. key   (this reverses the sign), Press    10x    key    (pressing 2nd key and then pressing If the pH 1. displayed), Press   (-)  key   of a solution you must take  the [H+]  (this is calculating the -anti-log), Press  2nd  key      (this acts like a shift key), Press  LOG  key   (note:  LOG is changed to function as 10x negative), Enter   3.5   Press the   +/- key   and then enter the exponent   5  (this enters the exponent as a  ), 3. Mayfair earned his Bachelor of Science in biochemistry from the University of California, Davis and his Juris Doctor from the University of the Pacific, McGeorge School of Law. Symbols appear at the top of the screen. Doing these same Sharp 520W, and Sharp EL-531;  but for Sharp Only use this method if you really like The models that I have identified the log key). Using the TI-30X ÖS, find the total distance that you need to travel.