It takes 120 mL of 0.15 M of carbonic acid (H2CO3) to neutralize 300 mL of sodium hydroxide (NaOH) for the following balanced chemical reaction:
2NaOH + H2CO3 → N2CO3 + 2NaOH
The concentration of the sodium hydroxide _____.
(1 point)
0.06 M
0.06 , M
0.03 M
0.03 , M
0.24 M
0.24 , M
0.12 M
I think you can find most of the standard answers on brainly, but here are answers for honors!
1. Yes, it is possible because they have similar intensive properties
2. Homogenous mixture
3. Due to the repulsion between electrons, valence electrons will be arranged as far apart from each other as possible
4. Neutral atoms of lead must have 82 protons. Ions must have 82 protons as well
5. Experiments that identified characteristics of atoms provided scientists with atomic weights and atomic numbers, which were used to organize the periodic table.
6. A covalent bond would form because the electron would be shared so both hydrogens have a full, stable shell.
7. K and Cl
8. Polar sugar molecules dissolve in water, which is polar.
9. High temperatures mean more kinetic energy, which keeps sodium and chlorine ions from combining, which increases solubility.
10. It accepts protons and only partially dissociates in water.
11. PH3 is a stronger acid than NH3.
12. The scientist is investigating Charles’s law, which shows that temperature and volume are directly proportional.
13. Fr
14. Student B, because of the law of conservation of matter.
15. The atoms have the same electronegativity.
16. bromine (Br)
17. BO3 would have because the electronegativity difference between boron and oxygen is greater than that between boron and hydrogen.
18. 6H2O + 6CO2 → C6H12O6 + 6O2
19. +2
20. 0.12 M
21. Tungsten (W) changes oxidation numbers from +6 to zero, so it undergoes reduction.
22. It has a higher boiling point than water, and it likely has stronger electrostatic forces between its molecules than water.
23. Heat each substance in liquid form to its boiling point in environments with the same atmospheric pressure. Measure the temperature of each substance.
24. Water has a higher boiling point because it has more hydrogen bonds.
25. The student should perform multiple trials of the same experiment, then take the average of all of the results.
26. Some liquids might have melting points that are far lower than room temperature.
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To find the concentration of sodium hydroxide (NaOH), we need to use the ratio of the balanced chemical equation. In the given equation:
2NaOH + H2CO3 → N2CO3 + 2NaOH
We see that for every 2 moles of NaOH, there is 1 mole of H2CO3.
Given that it takes 120 mL of 0.15 M H2CO3 to neutralize 300 mL of NaOH, we can set up a proportion to find the concentration of NaOH:
(0.15 M H2CO3) / (2 moles H2CO3) = (concentration NaOH) / (2 moles NaOH)
Simplifying the equation, we get:
0.15 M / 2 = concentration NaOH / 2
0.075 M = concentration NaOH / 2
Proceeding further, we isolate the concentration of NaOH:
concentration NaOH = 2 * 0.075 M
concentration NaOH = 0.15 M
Therefore, the concentration of sodium hydroxide (NaOH) is 0.15 M.
2NaOH + H2CO3 → N2CO3 + 2NaOH
1 point. Is this an exam? Here is a step by step procedure.
Step 1. Write and balance the equation. That's in the problem.
Step 2. You have M and L of H2CO3. Calculate moles.
Step 3. Convert mols H2CO3 from step 1 to moles NaOH using the coefficients in the balanced equation.
Step 4. Now that you have mols NaOH, solve for molarity in moles/L.
Post your work if you get stuck.