초 록
이번 실험에서는 Cu-IDA complex를 서로 다른 Cu(NO3)2?3H2O(aq, 0.02M): NH(CH2COOH)2(aq, 0.02M) 비율로 혼합하여 spectrophotometry로 흡광도를 측정하고, complex의 formula와 stability constant를 추정해보았다. 서로 다른 volume fraction(IDA: 2,5,7,10,12,13,15,18,20,23mL, total 25mL)의 mixture를 만들고, HNO3(aq, 15%)과 NaOH(aq, 0.5M)으로 모든 sam
At the equivalence point:mole of H+ = mole of OH-(Molarity of NaOH)*(Volume of NaOH used)=(Molarity of unknown)*(Volume of unknown)
PH = 7 at equivalent point
① Add 5 drops of the indicator solution(BTB) to the unknown solution.
② Rinse the buret at least 3 times with a few mL of the 0.1M NaOH standard solution .
③ Fill the buret with the 0.1M NaOH solution and be sure to elimi
Adjective phrases
[ NP an [ AdjP interesting] period]
[ NP a [AdjP lengthy] [AdjP enjoyable] [AdjP interesting] period]]
→can be stacked
a brown leather old practical suitcase.
→sound quite odd.
→Semantic domain(evaluation-property-age-colour-provenance-manufacture-type)
Determinative phrases
[NP [DP These] [DP two] images] say it all.
If we’re accepted in
- virtual disaster *his almost death
[verb]
- It virtually evaporated. He almost died.
[adjective]
- It was virtually impossible. He was almost dead.
[adverb]
- He spoke virtually inaudibly.
He was wounded almost fatally.
[Determinative]
- I have almost no money left.
[PP]
- It lasted almost until midnight.
[NP]
- I bought almost the last copy.