ph 计算习题课
DESCRIPTION
3. pH 计算习题课. 复习练习. 判断： 1 、 100℃ 时纯水的 pH 值为 6 ，小于 7 ，因而此时纯水呈酸性 2 、 10℃ 时纯水的 pH 值比 60℃ 时纯水的 pH 值大 3 、 25℃ 相同物质的量浓度的 NaOH 溶液和盐酸的 pH 值之和为 14 4 、 25℃ pH=3 的醋酸溶液中的 [H + ] 与 pH=11 的氨水中 [OH - ] 相等。. 填空、选择 - PowerPoint PPT PresentationTRANSCRIPT
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pH3
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1100pH67210pH60pH325NaOHpH144 25 pH=3[H+]pH=11[OH-]1HAHBHC0.1mol/LHApH2.7HB[OH-]=210-12mol/LHC[H+]/[OH-]108________
2pH[H+][H+] A21 B1001 C1100 D
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1 25pH=510pH 1000 pHpH=-lg[H+]= -lg105/10=-lg106=6[H+]=[OH-]([H+]+10-8). [H+]=10-14 [H+]=[H+]+10-8 =1.0510-7 pH7pH 12[H+][H+]
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1 pH=5 10pH 56 pHV, pH =) 10pH6pH=610pH 1pH=32pH A2.8 B3.2 C3.3 D4B
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3pHHXHYHZpHHXHYHZ AHX. HY. HZ BHZ. HY. HX CHX. HZ. HY DHY. HZ. HXpH BCD
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2 25pH=9NaOH10pH[OH]=105/10106pH=-lg[H+]=-lgKW/[OH]=-lg108=8pH 100mL10.05mL0. 2mol/LBa(OH)2pH1OH-H+
25pH=9NaOH1000 pHpH11pH10NH3H2O_______ 1/102[OH-][OH-]
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125pH=11LpH=41000LpH12100pH pH=-lg[H+]=-lg[1101+1000104/1+1000]=-lg[2104 ]=4-lg2=3.7
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1pH pH=2pH=4pH
pH=2pH=5pHpHpH2 pH=pH+0.3
pH=3pH=411pHpH=1 pH=pH+0. 26
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2pH [OH-]= 1 106 +1104) / (1+1) = 510-5 mol/L pH=14- pOH=9.7=10 - lg2=-lg(10-14/ 510-5 )= 9.7=-lg(210-10 )OH- H+D
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2pH 1pH=13 Ba(OH)2 pH=10NaOH13pH______2pH=13 Ba(OH)2 pH=10NaOH11pH______pHpH2 pH=pH- 0.3
pH=1 pH= pH- 0.26 3pH=13 NaOHpH=12NaOH11pH______
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325100ml 0.6mol/L0.4mol/LNaOH,pHpH NaOH+HCl=NaCl+H2O0.060.04pH=-lg[H+]=-lg0.02/0.1+0.1=-lg101=1
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3pH 25100ml 0.4mol/L0.6mol/LNaOH,pH25100ml 0.6mol/L0.4mol/LNaOH,pH
NaOH+HCl=NaCl+H2O0.060.04
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3 pH 1pH=13NaOHpH=2pH=11NaOH_____
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pH=12 NaOHV1 pH=2HClV2V1V2= _________pH=11NaOHV1 pH=2HClV2V1V2= _________pH=13 NaOHV1 pH=2HClV2V1V2= _________ (pHa)(pHb) , pHX pHa+pHb=14 [H+]=[OH-]Va: Vb=1pHa+pHb14 [H+][OH-] Va: Vb=1: 10 14-X 1pHa+pHb14[H+] [OH-] Va: Vb=10X-14: 1 1
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(pHa) (pHb) , pH pHa+pHb=14 [H+]=[OH-]Va: Vb=1pHa+pHb14 [H+][OH-] Va: Vb=1: 10 14-(pHa+pHb) pHa+pHb14[H+] [OH-] Va: Vb=10(pHa+pHb)-14: 11pH=2H2SO4pH=10NaOHpH=7H2SO4NaOH A110 B120 C19 D1100225101pH A12 B13 C14 D15
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110151114101110n:m14+lgm/n3:214+lg3/2