A buffer solution can maintains a narrow range of pH even when strong acid are added. In our experiment‚ we can see water is not a buffer‚ water can undergo very big changes when small amounts of strong acid or strong bases are added. When the strong acid‚ 100µl HCl was added into the dd water‚ the pH value changed from 7.38 to 5.83 which mean the dd water has turn into acid. The same phenomenon occurs while strong base‚ 100µl NaOH was added into the dd water. The pH value changed from 7.07 to 9
Premium PH Acid Acid dissociation constant
PROPERTIES OF SOLUTIONS A solution is a mixture of materials‚ one of which is usually a fluid. A fluid is a material that flows‚ such as a liquid or a gas. The fluid of a solution is usually the solvent. The material other than the solvent is the solute. We say that we dissolve the solute into the solvent. Some solutions are so common to us that we give them a unique name. A solution of water and sugar is called syrup. A solution of sodium chloride (common table salt) in water is called brine
Premium Water Sodium chloride Carbon dioxide
Solutions for Homelessness This great nation of awesome power and abundant resources is losing the battle against homelessness. The casualties can be seen on the street corners of every city in American holding an "I will work for food" sign. Homeless shelters and rescue missions are at full capacity. There is no room at the inn for the nation’s indigent. Anyone who has studied this issue understands that homelessness is a complex problem. Communities continue to struggle with this socio-economic
Premium Poverty Homelessness Homelessness in the United States
Com 100 – 22527 Chapter13 Presenting a Speech Confidently and Competently Introduction Styles of Delivering a Speech 1. Some speeches are impromptu P.282 2. Some speeches are extemporaneous P.282-283 3. Some speeches are scripted P.283-284 4. Some speeches are memorized P.284 Managing Public Speaking Anxiety 1. Public speaking anxiety is a common form of stress P.285 A. Psychological effects of public speaking anxiety B. Physical effects of public speaking anxiety C. Behavioral effects
Premium Public speaking Glossophobia Speech
1.John is twice as old as his friend Peter. Peter is 5 years older than Alice. In 5 years‚ John will be three times as old as Alice. How old is Peter now? 2. John’s father is 5 times older than John and John is twice as old as his sister Alice. In two years time‚ the sum of their ages will be 58. How old is John now? 3. Joan is 3 times as old as her sister. In 3 yeas ‚ shee will be two years more than twice the age her sister will be then. What are their ages? 4. Kevin is 4 years older than
Premium Silver Imperial units Gold
Solutions for serious and popular crimes Almost everyone in American realizes that we have a crime problem. Being a criminal justice major‚ I will deal with crime my whole career. Cities have the highest crime rate‚ but small towns shouldn’t be overlooked. Crime is like an iceberg‚ with only the tip of it being what is reported. Some criminals that are reported just serve half of their sentence. Punishment for a serious crime in American needs to be swift and sure‚ especially for homicides and drug
Premium Crime Prison Criminology
Electrolytic Solutions Solutions are sometimes grouped according to their ability to conduct electricity. Substances whose solutions conduct electricity are called electrolytes and those that do not conduct electricity are called nonelectrolytes. Also electrolytes can be strong or weak. Under strong electrolytes we have NaCl and CaCl2 which are ionic compounds‚ HCI‚ HNO3‚ HBr and H2SO4 are under acids and NaOH‚ KOH‚ and LiOH are under bases. Weak electrolytes are ionic compounds and slightly
Premium Electrolyte Sodium chloride Electrochemistry
Rachel Bohnenberger Professor Van Doorn ENVS 150-002 30 January 2015 Critique Two In the first video‚ The Story of Solutions‚ the main focus was to shift attention from making more and more for the economy to making the economy better. It was described in the video that in order to make the economy better‚ we need to focus our attention on sustainability. One example given was banning plastic bags. Two methods were given on how to accomplish said task—the old method and the new method. The old
Premium Plastic shopping bag Environment Bags
Refining Solutions Paper How do you protect yourself from becoming a victim of identity theft? A credit card statement with gas charges originating in Louisiana was the first sign of trouble. The owner of the card had not traveled to Louisiana during the dates of the charges‚ which indicated there was a problem. The feeling of anxiety and frustration took over because security was in place to prevent fraud. There are many ways thieves can access one’s personal information. According to CIPPIC
Premium Identity theft Credit card Fair Credit Reporting Act
Harmantaj sahota sahot111 103776105 Professor Oriet 10 march‚ 2013 Inventing solutions “To invent u need a good imagination and a pile of junk.” –Thomas Edison Inventing solutions and inventions is familiar to us in science and engineering. We use the word ‘invention’ in creative endeavours such as mathematics‚ music‚ literature and sometimes in fine art too. In a broader context invention can be
Free Incandescent light bulb Thomas Edison Nikola Tesla