WorksheetsBIO 101 Lab 3
Total questions: 23
Worksheet time: 23mins
How close a measurement is to the accepted value is called..
Accuracy
Precision
Significant
Estimate
The students measured length during a science experiment, they got 12 cm. But the actual measurement was 14.25 cm. What was the percent error?
15.79%
18.75%
2.25%
18%
What is the measure of the concentration of hydrogen ions (H+) in a solution?
pH
solubility
absorbance
refraction
A base is a substance
That releases OH- ions when dissolved in water
That releases H+ ions when dissolved in water
Does not release any ions when dissolved in water
None of the above
A pH of 3 is how many times more acidic than a pH of 5?
2
20
10
100
An acid
is a substance that releases H+ ions when dissolved in water
is a substance that does not release any ions when dissolved in water
is a substance that releases OH- when dissolved in water
releases an equal amount of OH- and H+ ions when dissolved in water
Water has a neutral because
it has more H+ ions than OH-
it has more OH- ions than H+
it does not produce any ions
it has an equal amount of H+ and OH- in solution
A proton acceptor is called a ____________?
base
acid
A proton donor is called a ____________?
base
acid
A pH of 8 is how many times more acidic than a pH of 11?
3
30
100
1000
In the antacid experiment what is a pH indicator, which allows determination of the pH by color?
bromocresol purple
HCl
antacid
water
During the antacid experiment using bromocresol purple, when the solution turns yellow, what does this mean?
the solution is acidic
the solution is neutral
the solution is basic
What is the control in the antacid experiment?
the antacid
the water
the bromocresol purple
the HCl
