Choose the most alkaline substance in the group.
2 answers:
Answer:
The correct answer is option D.
Explanation:
The pH of the solution is defined as negative logarithm of hydrogen ion concentration in the aqueous solution.
- Higher the value of hydrogen ion concentration lower will be the value of pH and more acidic will be the solution.
- Lower the value of hydrogen ion concentration higher will be the value of pH and more alkaline will be the solution.
The most alkaline substance will have higher value of pH.
So, from the given option mil magnesia has highest value of pH with 10.5 which makes is most alkaline from the other given options.
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Answer:
40.02 calories
Explanation:
V = 10 mL = 10g
we know t went <em>up</em> by 4°C, this is our ∆t as it is a change.
Formula that ties it together: Q = mc∆t
where,
Q = energy absorbed by water
m = mass of water
c = specific heat of water (constant)
∆t = temperature change
Q = (10 g) x (4.186 J/g•°C) x (4°C)
Q = 167.44 J
Joules to Calories:
167.44 J x 1 cal/4.184 J = 40.02 calories
(makes sense as in image it is close to the value).
