Ocean Acidification Lab

. An analysis water from well No 9 of the Manhattan beach, California, water composition showed : pH=7.8; silica: 19.2 mg SiO2/liter; calcium = 60 mg Ca2+/liter ; magnesium = 29.16 mg Mg2+/liter; sodium=78.2 mg Na+ /liter; potassium : 42.9 mg K+ /liter; bicarbonate= 292.8 mg HCO3 - /liter; sulfate=134.82 mg S04 2- /liter; chloride = 99.4 mg Cl- /liter and nitrate =6.2 mg NO3 - /liter. The relative atomic masses are: Si=28; Ca=40; Mg=24.3; Na= 23; K=39; O=16; H=1; C=12; S=32; Cl=35.5; N=14. (a) Calculate the ionic balance (b) Is the water analysis satisfactory from the point of view of analytical accuracy? Justify your answer

I need to calculate the total change in pH

Pls help ASAP

A team of investigators is out on a boat on a lake on a marvelous,sunny summer day, and they are taking water samples fromvarious depths in the lake so as to construct a plot of dissolvedO2 concentration versus depth, similar to the plot in Figure 1.16.When the investigators bring up a water sample from a depthof 20 m, why is it imperative that they measure its dissolved O2concentration immediately, rather than letting it sit on the deckfor 5 minutes? (Hint: Look at Figure 22.2A.

Does the H+ concentration increase or decrease when the pH drops from 5 to 4?

Imagine that I added 5 drops of lemon juice (an acid) to two solutions of water. Solution 1: pH 7, no buffer, 10 mL total volume Solution 2: pH 7, buffered, 10 ml total volume What will be the difference in pH after ading lemon juice to these two solutions? The pH in each solution will be equal Both solutions will remain at pH 7 Solution 2 will have a lower pH than Solution 1 Solution 1 will have a lower pH than Solution 2

How are increasing atmospheric concentrations of carbon dioxide affecting the pH of ocean water? a)Ocean water pH is increasing b)Ocean water pH is decreasing c)Ocean water pH is not changing

H,O Lab Time: 1:30 Pm H,0 + COH2 CozHcozt : PH - AR+Neo Air 1. Knowing that these 2 molecules are always floating in the air, hypothesize why your distilled water ( which indeed was pure when put in the container and therefore should have been pH 7), instead had a pH between 5 and 6 (i.e. acidic, not neutral). 2. Hypothesize why the addition of sucrose did not change the pH of distilled water (a big hint to the answer is in the lab section on Acids & Bases).

Which biological solution in Data Table II is the most acidic and what information helped you come to that decision?  What can you explain about the chemical composition of the solution based on its pH?

You are stranded on a lifeboat with several other people in the middle of the ocean.  You have run out of clean drinking water and are very thirsty.  The others have started to drink the seawater to quench their thirst. Since you’re waiting for rescue (and are a top notch AP Biology student), you decide to solve a couple of water potential problems to determine if drinking sea water is a good idea or not.  a) The majority of dissolved ions in seawater is NaCl, roughly a 0.5M concentration.  The ionization constant of NaCl is 2.0.  Calculate the solute potential for seawater if you know that the water is 2°C. b) Your own cells have a 0.15M concentration.  Calculate the solute potential for your own cells, knowing that body temperature is 37°C. c) Using your knowledge about water potential, if you drink the seawater, wat will happen when the seawater comes into contact with your body’s cells? Note: ΨP for animal cells is zero

How do humans contribute to ocean acidification/decreasing ocean pH and what is the backfire of this event to humanity?

The negative logarithm of the hydrogen ion concentration of an aqueous solution defines the of that solution. (answer case-sensitive) none of the above basic alkaline O pH

(please type answer no write by hend)

Which pH value indicates a solution that has more hydrogen ions that hydroxide ions? pH 9 pH 4 pH 7

4.8

The pH of a solution is 7, what is the H+ concentration?   Group of answer choices   1 x 10e-7 M 1 x 10e-3 M 1 x 10e-8 M 1 x 10e-9 M

Discuss the biological significance of water to living organisms.

In terms of pH, seawater is slightly ____ as compared to pure water. Group of answer choices smelly salty acidic basic

Explain the role of water in human body  in the following function: 1. Temperature regulation  2. Acid base balance  3. nerve impulse transmission

What is the pH of blood? The pH Scale Ammonia Solution Stomach Acid Vinegar Coffee Water Baking Soda Bleach 000 Stomach Tablets Battery Lemon Tomato Milk Blood Soap Drain Cleaner OO 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Acidic Neutral Alkaline

Why are buffers important in living systems? please explain



Revell X Bever x G JERSE X QUESTIONS Ginduct x acconline.austincc.edu/ultra/courses/_891351_1/cl/outline?legacyUrl=-2Fwebapps-2Fblackboard-2Fcontent-2FlaunchAssessment... 7 3 Conte X ✓property of water responsible for waters surface tension ✓attraction between molecules of different types, such as water being attracted to the inside of your straw ADL134 X measure of the average molecular motion or kinetic energy in an object the amount of heat required for 1g of a substance to change its temperature by 1°C $ = DL134 X Match each of the following with its best description. You may use each answer more than once. attraction between molecules of the same type such as A. versatile solvent water being attracted to water B. evaporative cooling C. adhesion quantity of heat a liquid must absorb for 1 g to be converted to a gas term used to describe when fast water molecules overcome the pull of hydrogen bonding and turn into a gas leaving behind cooler and slower moving water molecules because…

Is drinking alkaline water good for you? should be an original thought, not Google’s

Calculate the pH in water that is in equilibrium with calcite, but at the pre-industrial level of CO2 (280 ppm) and at the projected level in year 2100 with current international climate agreements (800 ppm). Ignore temperature and ionic strength effects.

Why does adding salt to water decrease its freezing point?   Group of answer choices Salt has a lower freezing point and will therefore increase the freezing point of water   Salt creates openings in the dense structure of cooling ice, which prevents the molecules from becoming so dense that they turn into ice   Sodium and chloride bond with the water molecules which disrupts the formation of ice crystals   Adding salt increases the energy available and movement of the water molecules which will slow down the freezing process

Acids, Bases, and plt: Bozeman 8:54 1.Define an ACID 2. Define a BASE 3 Define a BUFFER 4-Google: Buffer systems in the human body

ARAN2O H,0+ COH2 CO3E Hcot : PH- Air H,O Lab Time: 1:30 Pm 1. Knowing that these 2 molecules are always floating in the air, hypothesize why your distilled water ( which indeed was pure when put in the container and therefore should have been pH 7), instead had a pH between 5 and 6 (i.e. acidic, not neutral). 2. Hypothesize why the addition of sucrose did not change the pH of distilled water (a big hint to the answer is in the lab section on Acids & Bases).

What prevents the lakes of colder parts of the world from freezing solid from bottom up? Water in the solid form is at the maximum density. 88888 Surface tension keeps the ice floating. Ice is less dense than liquid water. Warm water is less dense than cold water. Wind causes mixing of the water.

please answer 6

List four functions that water performs in the human body

5