NaOH reacts with CH3COOH in 1:1 molar ratio to produce CH3COONa
NaOH + CH3COOH → CH3COONa + H2O
Mol CH3COOH in 52.0mL of 0.35M solution = 52.0/1000*0.35 = 0.0182 mol CH3COOH
Mol NaOH in 19.0mL of 0.40M solution = 19.0/1000*0.40 = 0.0076 mol NaOH
These will react to produce 0.0076 mol CH3COONa and there will be 0.0182 - 0.0076 = 0.0106 mol CH3COOH remaining in solution unreacted . Total volume of solution = 52.0+19.0 = 71mL or 0.071L
Molarity of CH3COOH = 0.0106/0.071 = 0.1493M
CH3COONa = 0.0076 / 0.071 = 0.1070M
pKa acetic acid = - log Ka = -log 1.8*10^-5 = 4.74.
pH using Henderson - Hasselbalch equation:
pH = pKa + log ([salt]/[acid])
pH = 4.74 + log ( 0.1070/0.1493)
pH = 4.74 + log 0.717
pH = 4.74 + (-0.14)
pH = 4.60.
Answer: Silicon the first two electrons will go in the 1s orbital. Since 1s can only hold two electrons the next 2 electrons for Silicon go in the 2s orbital. The next six electrons will go in the 2p orbital. The p orbital can hold up to six electrons.
Hope this helps! :)
Silver is Ag from the latin Argentum
Lead is Pb from the latin Plumbum
S. Properties can be anything from composition to color to ductility. Without knowing an object's properties, it is impossible to characterize it. For example, looking at some common properties of metals helps to differentiate them from non-metals or metalloids.
<span>1) Boiling water for pasta-> physical
2) Digesting food -> chemical
3) Soda goes "flat" -> physical
4) Stretching a rubber band -> physical
5) Grilling a hamburger -> chemical
6) Adding sugar to tea -> physical
7) Adding lemon to tea -> physical
8) Mowing the grass -> physical
9) The smell of perfume "wafts" across the room -> physical
10) Candle wax melts -> physical
11) Breaking glass-> physical
12) Making cement-> chemical
13) Lighting a match-> chemical
14) Water is absorbed by a paper towel-> physical
15) Firefly glows in the dark-> chemical
16) Snow melts-> physical
17) Bleaching your hair-> chemical
18) Turning on a light bulb-> physical
19) Milk goes sour-> chemical
20) Shooting off fireworks-> chemical</span>
