Question

Ë®ÊÇÎÒÃÇÊìϤµÄÎïÖÊ£¬ÕýÈçͬѧÃÇËùÖªµÀµÄ£¬Ë®ÄÜ¡°·ÖÁÑ¡±³öÒ»¸öÖÊ×Ó¶øÀë½â£¬´Ë´¦´òÒýºÅÊÇÓÉÓÚ·ÖÁѳöÀ´µÄÖÊ×Ó²»ÊÇÒÔÓÎÀë״̬´æÔÚÓÚÕæʵµÄ»¯Ñ§ÌåϵÖУ¬¶øÊÇÁ¢¼´ÓëÁíһˮ·Ö×Ó½áºÏ£ºH₂O+H₂O?H₃O⁺+OH^-K₁=c£¨H₃O⁺£©?c£¨OH^-£©/c£¨H₂O£©ÇâÑõ¸ùÀë×ӿɽøÒ»²½Àë½â£ºOH^-+H₂O?H₃O⁺+O^2-K₂=c£¨H₃O⁺£©?c£¨O^2-£©/c£¨OH^-£©
£¨1£©¼ÆËã25¡æʱK₁µÄÖµ£®______
£¨2£©ÒÑÖª25¡æʱK₂=10^-36£¬¼ÆËãÔÚ¶àÉÙÌå»ýµÄË®ÀﺬÓÐÒ»¸öÑõ¸ºÀë×Ó£¿______£®

Answer 1

£¨1£©25¡æʱ£¬´¿Ë®ÖÐc£¨H₃O⁺£©?c£¨OH^-£©=K_w=10^-14£¬c£¨H₂O£©=

1000g 18g/mol

1L

=55.6mol/L£¬K₁=

c(H3O+)£®c(OH-)

c(H2O)

=

10-14

55.6

=1.8¡Á10^-16£¬¹Ê´ð°¸Îª£º1.8¡Á10^-16£»
£¨2£©Ë®ÖÐc£¨H₃O⁺£©=c£¨OH^-£©£¬K₂=

c(H3O+)£®c(O2-)

c(OH-)

Ôòc£¨O^2-£©=K₂?c£¨OH^-£©/c£¨H₃O⁺£©=K₂=10^-36£¬
1LË®ÖÐÑõ¸ºÀë×ӵĸöÊý=6.02¡Á10²³¡Á10^-36=6.02¡Á10^-13£¬ÉèxLË®Öк¬ÓÐÒ»¸öÑõ¸ºÀë×Ó£¬Ôò1£º6.02¡Á10^-13=x£º1£¬x=1.7¡Á10¹²£¬
¹Ê´ð°¸Îª£º1.7¡Á10¹²LË®ÖÐÓÐÒ»¸öÑõ¸ºÀë×Ó£®