Question 13 (1 point)
Match the pH level to the correct term.
Column A
1._pH 0-3
2._ ph 4-6
3.__ph 8-10
4.__ ph 11-14
5.__ph 7

Column B
a. Strong base
b. Weak acid
C. Strong acid
d. Neutral
e. Weak base

Calculate the expected ph values of the buffer systems from the experiments (a,b,c,d), using the henderson- hasselbalch equation, ph-pka+log[a-]/[ha]. use for pka values carbonic acid= 6.37, and acetic acid= 4.75.

Drive down any three characteristic of modern periodic table

Which set of characteristics best describes igneous rock? a) largest type of rock, made of organic matter, hardest type of rock b) least abundant type of rock, made of other rocks, made mostly of minerals c) found on all continents, contains wavy bands of stripes, contains fossils d) most abundant type in earth's crust, made of magma/lava, contains no fossils