What Am I? 1. A variety of equipment can be attached to me, so your hands can be free...-
2. I can be used to find the mass of a substance. Adjust the rider beams, starting with the largest, and add up the numbers
3. If you need the contents of a test tube to stay put during an experiment, stick me on top and I'll make sure they stay
4. If you put a beaker on top of me, I will heat your substance. I am safer than a Bunsen burner because I don't have a flame, but don't walk away from mel.
5. I have a wide base and a narrow neck. I was named after the German chemist who created me in 1861. You will use me for solutions that need to be
swirled...
6. I am a flat-bottomed jar used often in chemistry. I have a lip to pour out my contents. Mix contents in me but don't use me for precise measuring...

If 10.g of agno3 is available, what volume of 0.25 m agno3 can be prepared

7. using your knowledge of colligative properties explain whether sodium chloride or calcium chloride would be a more effective substance to melt the ice on a slick sidewalk. use 3 – 4 sentences in your explanation. 8. when a 2.5 mol of sugar (c12h22o11) are added to a certain amount of water the boiling point is raised by 1 celsius degree. if 2.5 mol of aluminum nitrate is added to the same amount of water, by how much will the boiling point be changed? show all calculations leading to your answer or use 3 – 4 sentences to explain your answer. 9. if 5.40 kcal of heat is added to 1.00 kg of water at 100⁰c, how much steam at 100⁰c is produced? show all calculations leading to an answer. 10. the freezing of water at 0⁰c can be represented as follows: h2o (l) ↔ h2o(s) the density of liquid water is 1.00 g/cm3. the density of ice is 0.92 g/cm3. in 3 – 4 sentences explain why applying pressure causes ice to melt.

Phosphoric acid is a triprotic acid ( =6.9×10−3 , =6.2×10−8 , and =4.8×10−13 ). to find the ph of a buffer composed of h2po−4(aq) and hpo2−4(aq) , which p value should be used in the henderson–hasselbalch equation? p k a1 = 2.16 p k a2 = 7.21 p k a3 = 12.32 calculate the ph of a buffer solution obtained by dissolving 18.0 18.0 g of kh2po4(s) kh 2 po 4 ( s ) and 33.0 33.0 g of na2hpo4(s) na 2 hpo 4 ( s ) in water and then diluting to 1.00 l.