pH Scale Because we know that a pH of 7 is neutral, we can figure that a substance with a low pH is a very strong acid. An acid with a pH approaching 7 is a weak acid. A substance with a pH of 7 is neutral, as we have learned. As the pH of a substance rises from 7, it...
Determining the Concentration of an Unknown Substance from Titration Determining the pH of the Excess Reactant During Titration Lesson Summary Frequently Asked Questions What happens when you titrate a strong acid with a strong base? If you titrate a strong acid with a base the pH starts low, ...
Stomach acid is a strong acid at a pH of about 2. Soaps and detergents are more basic with a pH around 8, depending on the product. Density as a Physical Property Thedensityof a substance is how much mass of that substance is packed into a given volume. Density is calculated by dividi...
The reaction arrow points to the right; thus, indicating that this chemical reaction proceeds in the forward direction. The numbers that precede each chemical formula represent the number of moles of each substance that are needed to complete the chemical reaction. The single arrow in this ...
A pure substance is made up of only one type of particle and has a fixed structure. Presenting the most common examples of such substances.
It has been found that infusion of large-volume (i.e., >2 L) can inducehyperchloremiain healthy adults. Furthermore, hyperchloremia (i.e., a high amount of chloride ions) is associated with hyperkalemia, metabolic acidosis, and negative protein balance. Hyperkalemia is the increase in the...
从上文Johnson建议她将烟放在口袋以防被警察看见，可以推断出小女孩没有把烟放到口袋里而是拿着烟就向门口走去。take表示“拿(着)”。
Secondary succession is the re-colonization process of a full-fledged ecological community from the remnants of the soil after an ecological disturbance occurs.
brown caffeinated drink. Each sip tastes and looks the same. And once the coffee is ready, you can’t separate its ingredients (coffee, milk, and sugar) via physical methods. It’s a perfect example of a homogeneous mixture that takes the characteristics of the substance you have added the...
Rest of Summary: The rest of your essay is going to give the reasons and evidence for that main statement. In other words, what is the main point the writer is trying to make, and what are the supporting ideas he or she uses to prove it? Does the author bring up any opposing ideas...