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A way to help memorize base Log values and break down scientific notation into log approximations to help with calculating pH
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Log (2)
≈ 0.3
Log (3)
≈0.5
Log (5)
≈0.7
How would 6.9 × 10 ^-4 be broken into Log?
Log (6.9) and Log (10^-4)
Log (10)
= 1
Log (100)
= 2
Log (50)
≈ 1.7
log (7)
≈0.85
log (1)
0
Log (0.1) same as log (10^-1)
-1
Log (0.01) same as Log (10^-2)
-2
Log (0.001) same as Log(10^-3)
-3