Question about Texas Instruments TI-30XA Calculator

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You calculate the pH with the relation

pH=-log(c) where c is the
value of concentration in mol/L.

ex: c[H+]= 3.57x10^(-6)

pH: (-) [LOG]
3.57 [2nd][EE] [(-)] 6 [ ) ]

Here you have 2 change sign key press
[(-)]

If you have the pH, and want to calculate the concentration
that yields that value of the pH you proceed as follows

c= 10^(-pH)

Ex
pH=8.23

c: [2nd][LOG] [(-) 8.23 [)]

General shortcut.

If
concentration is of the form c[H+]= 1*10^(-a) where a is an integer
between 0 and 14, the pH is equal to the positive value of exponent.

Ex:c[H+]=1x10^(-5)
Mol/L then the pH is just the positive value of the exponent, ie 5
because pH=-log(1.x10^-5) =- log1 -log(10^-5)=0 -(-5)=5

Above I use
the rule log(axb)=log(a)+log(b) , the rule log(a^b) = b*log(a)and the
facts that log(1)=0 and log(10)=1, the last being true if log stands for
log in base 10.

Posted on Jun 09, 2011

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Posted on Jan 02, 2017

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not sure what you want,cubic root button is like a tick with a line at the top

Jan 09, 2012 | Texas Instruments TI-30XA Calculator

Of course you can divide by a log. As an example, to divide 2 by the log of 3, press

2 / 3 LOG =

To divide 2 by the natural log of 3, press

2 / 3 LN =

2 / 3 LOG =

To divide 2 by the natural log of 3, press

2 / 3 LN =

Oct 27, 2011 | Texas Instruments TI-30XA Calculator

The inverse of the common log function is the power function with base 10 (10^). It shares the same physical key as the log. You acees the function by pressing [2nd] [log]

Sep 09, 2011 | Texas Instruments TI-30XA Calculator

You don't want the square root. In this example, you want the sixth root.

Press 4 5 2nd [xth-root] 6 =

The xth-root is the shifted function of the y^x key, located just above the divide key.

Press 4 5 2nd [xth-root] 6 =

The xth-root is the shifted function of the y^x key, located just above the divide key.

Jun 11, 2011 | Texas Instruments TI-30XA Calculator

I'm going to use sin(90°) as an example. You would hit the sin button, type in 90, then hit ). You must type in the close parenthesis or the calculator won't read it correctly. The answer should be 1.

Jun 08, 2011 | Texas Instruments TI-30XA Calculator

7 LOG / ( 6 * 7 LOG - 2 LOG ) =

Mar 30, 2011 | Texas Instruments TI-30XA Calculator

The following examples will demonstrate how to
convert decimals into fractions using the TI-30Xa and TI-30Xa Solar.
Please be aware that TI-30Xa Solar School Edition calculators do not
have this functionality.

**Example**: Convert .25 to 1/4

- Input .25, press [2nd][<--] (says F<>D above it).

**** F<>D means fraction to decimal, decimal to fraction. **

**Example**: Convert 1.38 to 1_19/50

- Input 1.38, press [2nd][<--].

**Example**: Convert 9.75 to 9_3/4

- Input 9.75, press [2nd]{<--].

- Input .25, press [2nd][<--] (says F<>D above it).

- Input 1.38, press [2nd][<--].

- Input 9.75, press [2nd]{<--].

Mar 08, 2011 | Texas Instruments TI-30XA Calculator

Hi,

Sorry to contradict you but there are many types of logarithms, the most important ones are

**[LOG]**, and the natural logarithms are labeled** [LN]**.

The inverse function of the natural log function is the exponential (e^(x)), and the inverse of the log in base ten function is the function ten to the power of. It is called (sometimes) the antilog

Ex:

Question What is the antilog of 3.5678?

Answer The antilog of 3.5678 is 10^(3.5678) = 3696.579068

Verification: log(3696.57908) =3.5678

Hope it helps.

Sorry to contradict you but there are many types of logarithms, the most important ones are

- the common logarithms (log in base 10),
- the natural logarithms (logarithms in base e)
- the binary logarithms (logarithms in base 2)

The inverse function of the natural log function is the exponential (e^(x)), and the inverse of the log in base ten function is the function ten to the power of. It is called (sometimes) the antilog

Ex:

Question What is the antilog of 3.5678?

Answer The antilog of 3.5678 is 10^(3.5678) = 3696.579068

Verification: log(3696.57908) =3.5678

Hope it helps.

Nov 29, 2009 | Texas Instruments TI-30XA Calculator

pH is minus (log to base 10) of the hydrogen ion activity of an aqueous solution, or (log to base 10) of (1/hydrogen ion activity)

To get the inverse log, i.e the hydrogen ion activity corresponding to a specified pH, simply enter the pH value and press

2nd

LOG

1/x

Answer 0.001

To get the inverse log, i.e the hydrogen ion activity corresponding to a specified pH, simply enter the pH value and press

2nd

LOG

1/x

Answer 0.001

Apr 22, 2008 | Texas Instruments TI-30XA Calculator

Download the small instruction book from TI web site, keystrokes and examples at pages 10/11

http://education.ti.com/educationportal/downloadcenter/SoftwareList.do?website=US&tabId=2&paneId=18

http://education.ti.com/educationportal/downloadcenter/SoftwareList.do?website=US&tabId=2&paneId=18

Mar 22, 2008 | Texas Instruments TI-30XA Calculator

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