Answer:
D. 6.3 x 10-5 mol/L NaOH
Explanation:
Alizarin yellow is an indicator that is yellow when pH < 10.1. In the same way, thymol blue is blue when pH > 9
That means the pH of the solution is between 9 - 10.1
Any acid as HCl could have a pH of these.
The solution of 3.2x10⁻⁴M NaOH has a pH of:
pOH = -log[OH-] = 3.49
pH = 14-pOH = 10.51. The pH of the solution is not 10.5
Now, the solution of 6.3x10⁻⁵M NaOH has a pH:
pOH = -log[OH-] = 4.2
pH = 14-pOH = 9.8
The pH of the solution could be 9.8. Right option is:
<h3>D. 6.3 x 10-5 mol/L NaOH</h3>
Woah, that doesn't look like high school. That's gotta be college level.
Suitable hypothesis for the experiment is as temperature increases rate of reaction also increases.
<h3>What is rate of reaction?</h3>
Rate of any reaction gives idea about the speed of the completion of that reaction.
Rate of reaction will be affected by many factors are some such factors are:
- Dependent variable: Rate of change of the chemical species which are present in the reaction is the dependent variables.
- Independent variable: Independent variable is temperature as it does not depends on the rate, in spite of this rate depends on temperature.
- Controlled variables: Environment of the reaction, amount of catalyst, light exposure to the reactions are the controlled variables as it depends on the requirement of the amount of product.
Hence, hypothesis is as temperature increases rate of reaction also increases.
To know more about rate of reaction, visit the below link:
brainly.com/question/19513092
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In order for a solute to dissolve in a solvent, the attractive forces in a solute need to be broken. So, the best option is A.